Articles tagged with "quantum-materials"
One of the largest time crystals ever made to unlock new quantum paths
Researchers from IBM, Basque Quantum, and NIST have created one of the largest and most complex time crystals to date—a 144-qubit, two-dimensional structure—using IBM’s Quantum Heron chip. Time crystals are exotic quantum materials that exhibit repeating patterns in time rather than space and can only exist out of thermal equilibrium. Previously, time crystals were limited to small, one-dimensional chains due to the complexity of modeling larger systems. This breakthrough demonstrates the ability to build—not just simulate—large, robust time crystals, revealing new quantum dynamics and opening avenues for studying quantum materials, spin interactions, and nanoscale technologies. The team overcame significant challenges in verifying quantum results by employing a hybrid quantum-classical approach. They used tensor network methods and belief propagation on classical computers to approximate and refine the quantum states generated by the quantum hardware. This quantum-centric supercomputing strategy allowed for advanced error mitigation, significantly reducing uncertainty and improving the accuracy of the quantum computations. The research highlights the growing potential of integrating quantum
quantum-computingtime-crystalsquantum-materialsIBM-Quantum-Heron-chipnanoscale-technologiesquantum-researchquantum-physicsQuantum engineers turn theory into physics via exciton control path
Researchers from the Okinawa Institute of Science and Technology (OIST) and Stanford University have developed a novel method for Floquet engineering by utilizing excitons instead of photons. Floquet engineering involves modifying a material’s quantum states by applying periodic external forces, typically using light to alter electron energy bands in semiconductors. However, traditional photon-based Floquet engineering requires very high light intensities and frequencies, which can damage materials and produce only short-lived effects. In contrast, excitonic Floquet engineering leverages excitons—quasiparticles formed by electron-hole pairs within the material itself—which couple more strongly to the material and require significantly lower light intensities to induce hybridization of energy bands. The team demonstrated that by exciting a semiconductor to create a dense population of excitons, they could achieve stronger and more stable Floquet effects with much less optical power. Using time- and angle-resolved photoemission spectroscopy (TR-ARPES), they observed excitonic Floquet replicas after reducing the optical
quantum-materialsexciton-controlFloquet-engineeringsemiconductor-physicsenergy-bandsphotoemission-spectroscopyquantum-statesScientists discover 'impossible' quantum state at near absolute zero
Scientists at Vienna University of Technology (TU Wien), collaborating with theorists from Rice University, have discovered a novel quantum state that defies traditional physics assumptions about electron behavior at ultra-low temperatures near absolute zero. Using a cerium-ruthenium-tin (CeRu₄Sn₆) material cooled to below one degree above absolute zero, they observed a spontaneous anomalous Hall effect without any external magnetic field—a hallmark of topological behavior. This finding challenges the long-held belief that topological states require electrons to behave as well-defined particles with clear velocities and energies. Instead, the material exhibited intense quantum fluctuations where the usual quasiparticle model breaks down, yet topological properties still emerged. The research reveals that topological states can exist in a more abstract mathematical form, independent of particle-like electron states, leading to the identification of a new quantum phase termed an "emergent topological semimetal." This discovery broadens the understanding of topology in quantum materials and suggests that quantum critical
quantum-materialstopological-materialsquantum-statelow-temperature-physicsanomalous-Hall-effectadvanced-materialsquantum-computingQuantum disorder powers self-sustaining microwave signal in diamond
Researchers from TU Wien and the Okinawa Institute of Science and Technology have demonstrated that superradiance—a quantum phenomenon where many particles emit energy collectively in a powerful but typically short-lived burst—can be harnessed to produce long-lived, self-sustaining microwave signals without external energy input. Using a diamond crystal embedded with nitrogen-vacancy (NV) centers placed inside a microwave cavity, they observed that after an initial superradiant burst, the system emitted a series of narrow, coherent microwave pulses lasting up to one millisecond. This unexpected persistence arises from spin–spin interactions within the diamond that dynamically redistribute energy among the spins, effectively enabling the system to drive itself through a process called self-induced superradiant masing. This discovery overturns the traditional view that such interactions only introduce noise and destroy coherence in quantum systems. Instead, the chaotic spin dynamics organize themselves to maintain a stable, coherent microwave signal. The ability to generate long-lived, self-sustaining quantum signals has significant implications for practical technologies
quantum-technologymicrowave-signalsdiamond-NV-centerssuperradiancequantum-spinsquantum-materialsquantum-communicationWhat breaks quantum monogamy? Electron crowding delivers a surprise
New research challenges the long-held notion of quantum monogamy, where certain quantum particles, such as excitons—bound states of electrons and holes—were thought to maintain exclusive, stable pairings. Traditionally, excitons behave like bosons and are considered monogamous because breaking their electron-hole bonds requires energy. However, experiments led by researchers at the Joint Quantum Institute (JQI) revealed that under extreme electron crowding in a specially engineered layered material, excitons unexpectedly increased their mobility instead of slowing down. This surprising result indicated that excitons could abandon their exclusive partnerships and interact with multiple electrons, effectively breaking the monogamous behavior. The team constructed a material forcing electrons and excitons into a grid of discrete sites, where electrons, as fermions, refused to share sites, initially slowing exciton movement as electron density increased. Yet, once nearly all sites were occupied by electrons, excitons began moving more freely and farther than before, a phenomenon replicated across different samples and experimental setups worldwide
quantum-physicselectron-behaviorexcitonssuperconductivitymaterials-sciencequantum-materialsfermions-and-bosonsFirst self-powered quantum microwave signal achieved in experiment
Researchers from Vienna University of Technology (TU Wien) and Okinawa Institute of Science and Technology (OIST) have experimentally demonstrated the first self-induced superradiant masing—microwave signal generation without external driving forces. Superradiance, a quantum optics phenomenon where atoms or quantum dots emit intense, coherent light pulses collectively, was traditionally associated with energy loss and short bursts. However, the team observed a novel behavior where quantum particles, specifically electron spins in nitrogen-vacancy (NV) centers within diamond ensembles, self-sustain long-lived, stable microwave pulses through intrinsic spin–spin interactions. This self-organization from seemingly disordered spin interactions produces a coherent microwave signal, revealing a fundamentally new mode of collective quantum behavior. The discovery challenges previous assumptions that interactions among quantum particles disrupt coherence, showing instead that these interactions can fuel and maintain quantum emission. Large-scale computational simulations confirmed that spin interactions continually repopulate energy levels, sustaining the superradiant reaction over extended periods. This breakthrough opens new avenues for
quantum-technologymicrowave-signalssuperradianceenergy-harvestingquantum-sensorsquantum-materialsspintronicsScientists crack the atomic code behind single-photon quantum emitters
Scientists have made a significant breakthrough in understanding and controlling single-photon quantum emitters—tiny atomic-scale light sources critical for future quantum technologies such as quantum computing, secure communications, and sensitive sensors. These quantum emitters release light one photon at a time, but their atomic origins were previously difficult to observe and link directly to their optical behavior. Researchers at Argonne National Laboratory overcame this challenge by using a novel instrument called QuEEN-M, which combines atomic-resolution imaging with cathodoluminescence spectroscopy. This allowed them to simultaneously identify the exact atomic defects in ultrathin hexagonal boron nitride crystals responsible for single-photon emission. The team discovered that twisting layers of hexagonal boron nitride at specific angles created “twisted interfaces” that enhanced the light emission signal by up to 120 times, enabling localization of emitters with nanometer precision. They identified the atomic structure of a blue quantum emitter as a carbon dimer—two vertically stacked carbon atoms within the crystal lattice.
quantum-emittersmaterials-sciencehexagonal-boron-nitrideatomic-scale-imagingquantum-materialscathodoluminescence-spectroscopyultrathin-materialsGermanene breakthrough shows quantum states can switch on command
Dutch researchers from the University of Twente and Utrecht University have demonstrated for the first time that quantum states in ultra-narrow germanene nanoribbons can be switched on and off using only a local electric field. Germanene, a material similar to graphene but composed of a single layer of germanium atoms arranged in a slightly wavy sheet, exhibits zero-dimensional topological end states when cut into ribbons just a few atoms wide. These topological states are of great interest because they naturally resist noise, a major obstacle in quantum computing, making them promising candidates for more stable qubit components. In their experiments, the team used a scanning tunneling microscope to precisely control the electric field by adjusting the tip-to-surface distance, thereby toggling the presence of these topological end states on command. The switching behavior depended on the ribbon width: in ultra-narrow ribbons, the end states disappeared at higher fields, whereas in wider ribbons, stronger fields activated the states. Theoretical modeling helped explain this geometry-dependent
materialsquantum-materialsgermanenenanoribbonsquantum-stateselectric-field-controltopological-statesRecord-breaking quantum material could outpace every semiconductor
Scientists from the University of Warwick and the National Research Council of Canada have developed a silicon-compatible quantum material exhibiting the highest electrical conductivity ever recorded for such materials. This breakthrough involves a nanometer-thin, compressively strained germanium layer grown on a silicon wafer, termed compressively strained germanium on silicon (cs-GoS). By applying controlled compressive strain, the researchers created an ultra-pure crystal structure that significantly enhances charge mobility, achieving a record hole mobility of 7.15 million cm²/V·s—far surpassing standard industrial silicon and previous group-IV semiconductors compatible with modern chip fabrication. This advancement addresses key challenges in the semiconductor industry, which faces physical limits as silicon-based chips shrink and generate more heat. Germanium, known for superior charge mobility but difficult to integrate with silicon manufacturing, is now viable at scale through cs-GoS. The material’s compatibility with existing silicon fabrication infrastructure promises faster, more energy-efficient electronics and quantum devices, potentially extending the life of silicon chip
materialssemiconductorsquantum-materialsgermaniumsilicon-technologyelectronic-devicesenergy-efficiencyNew ultrathin metasurface boosts photon generation for next-gen quantum chips
Columbia Engineering researchers have developed an ultrathin metasurface device that significantly enhances nonlinear optical effects at the nanoscale, advancing the miniaturization of quantum hardware. Building on prior work where a 3.4-micrometer-thick crystalline device generated entangled photon pairs, the team has now reduced the thickness to just 160 nanometers by introducing metasurfaces—artificial nanoscale patterns etched into ultrathin crystals. This approach boosts second harmonic generation by nearly 150 times compared to unpatterned samples, enabling more efficient photon generation at telecom wavelengths, which is crucial for future quantum devices. The research focuses on transition metal dichalcogenides, specifically molybdenum disulfide flakes, which are atomically thin but previously limited in photon generation efficiency. By etching repeating nanoscale lines into these flakes, the team achieved strong nonlinear optical effects beyond traditional methods, while simplifying fabrication using standard cleanroom tools. This breakthrough paves the way for compact, integrable quantum phot
materialsquantum-materialsmetasurfacesphoton-generationnonlinear-optics2D-materialsquantum-technologyExaflop simulations boost accuracy in quantum materials research
Researchers from the University of Southern California and Lawrence Berkeley National Laboratory have achieved groundbreaking exascale computing speeds to simulate electron behavior in complex quantum materials with unprecedented accuracy. Utilizing three of the world’s most powerful supercomputers—Aurora at Argonne, Frontier at Oak Ridge, and Perlmutter at Berkeley Lab—they pushed the BerkeleyGW open-source code to exceed one exaflop on Frontier and 0.7 exaflops on Aurora. This scale of computation enables detailed modeling of many-body quantum interactions, such as electron-phonon coupling, which are critical for understanding phenomena like superconductivity, conductivity, and optical responses in materials. A key innovation was the development of GW perturbation theory (GWPT) within BerkeleyGW, allowing the integration of quantum interactions into a unified framework and significantly improving simulation fidelity beyond traditional density functional theory (DFT) methods. Aurora’s large memory capacity enabled simulations involving tens of thousands of atoms, previously unattainable at this scale. The team’s decade
quantum-materialsexascale-computingelectron-phonon-couplingsuperconductivityBerkeleyGWhigh-performance-computingmaterials-scienceLight reveals atoms dancing for the first time in 2D materials
Researchers from Cornell and Stanford Universities have, for the first time, directly observed atoms in two-dimensional (2D) moiré materials dynamically twisting and untwisting in response to light. These ultrathin materials, composed of stacked atomic layers, exhibit unusual properties such as superconductivity and magnetism when slightly twisted. Using ultrafast electron diffraction combined with Cornell’s custom-built Electron Microscope Pixel Array Detector (EMPAD), the team captured this rapid atomic motion occurring within a trillionth of a second, revealing that these materials are not static but rhythmically flex and twist under laser pulses. This breakthrough challenges the previous assumption that moiré materials remain fixed once stacked at a certain angle. Instead, the study shows that light can dynamically enhance and control the twisting motion in real time, opening new possibilities for manipulating quantum behaviors in 2D materials. The collaboration leveraged Stanford’s expertise in engineered materials and Cornell’s advanced imaging technology, enabling the first direct visualization of these ultrafast atomic shifts.
materials2D-materialsmoiré-materialsultrafast-electron-diffractionatomic-motionquantum-materialslaser-pulsesChicago scientists find new way to link quantum computers across US
Researchers at the University of Chicago have developed a breakthrough method to connect quantum computers over distances exceeding 1,200 miles, vastly surpassing the previous limit of a few kilometers. This advancement hinges on significantly extending the quantum coherence times of individual erbium atoms—from 0.1 milliseconds to over 10 milliseconds—enabling entangled atoms to maintain coherence long enough for long-distance quantum communication. The team demonstrated potential latency as low as 24 milliseconds, theoretically allowing quantum computers to link across distances up to 2,485 miles, such as between Chicago and Colombia. The key innovation lies in the fabrication technique: instead of the traditional Czochralski method, which melts and cools materials to form crystals, the researchers used molecular-beam epitaxy (MBE) to build rare-earth-doped crystals atom by atom. This bottom-up approach produced components with remarkably long-lived quantum coherence and high matrix crystallinity, enabling kilohertz-level optical linewidths and erbium qubit spin coherence times
quantum-computingquantum-networksquantum-coherencerare-earth-doped-crystalsmolecular-beam-epitaxyquantum-internetquantum-materialsMIT gets first 'direct view' of exotic superconductivity in graphene
MIT physicists have achieved a major breakthrough by obtaining the first direct measurement of unconventional superconductivity in magic-angle twisted tri-layer graphene (MATTG), a material made of three stacked and twisted atom-thin carbon sheets. Using a novel experimental platform that combines electron tunneling with electrical transport measurements, the team directly observed MATTG’s superconducting gap, which exhibits a distinctive V-shaped profile unlike the flat gap seen in conventional superconductors. This finding confirms that the superconducting mechanism in MATTG is fundamentally different and likely arises from strong electronic interactions rather than lattice vibrations, marking a crucial step toward understanding and designing new superconductors. This research advances the global pursuit of room-temperature superconductors, which could revolutionize technology by enabling zero-energy-loss power grids, practical quantum computers, and more efficient medical imaging devices. The study, led by MIT physicists including Jeong Min Park and Shuwen Sun and senior author Pablo Jarillo-Herrero, builds on the emerging field of “twistronics
materialssuperconductivitygraphenequantum-materialsenergy-efficient-technologyroom-temperature-superconductorsMIT-researchElusive polaron 'dance' discovery solves decades-old quantum mystery
An international team of researchers from Kiel University and the DESY research center has resolved a decades-old quantum physics mystery by experimentally identifying a polaron—a quasiparticle formed by the strong coupling of an electron with atomic vibrations—in a rare-earth compound made of thulium, selenium, and tellurium (TmSe₁₋ₓTeₓ). This discovery explains why the material abruptly transitions from a metal to a perfect insulator when the tellurium content reaches about 30 percent, a phenomenon previously unexplained by its chemical composition. The polaron represents a “dance” between the electron and a distortion in the crystal lattice, which slows electron movement and causes the loss of electrical conductivity. The breakthrough came after years of high-resolution photoemission spectroscopy experiments at global synchrotron facilities, where a persistent but initially dismissed “small bump” signal was systematically investigated. By incorporating electron-phonon coupling into the periodic Anderson model, theorists and experimentalists achieved a perfect match between
materialsquantum-materialspolaronelectron-phonon-interactioncrystal-latticeconductivityrare-earth-materialsUS team finds problems that even quantum computers can't crack
Researchers at Caltech, led by Thomas Schuster, have identified intrinsic limits in quantum computing’s ability to efficiently solve certain complex problems, specifically in determining the phases of matter from unknown quantum states. While quantum computers leverage qubits to process vast possibilities simultaneously, some quantum phase recognition tasks remain beyond their reach. The study highlights that as the correlation length (ξ)—which measures how far quantum system properties influence each other—increases, the computational time required to identify phases grows exponentially. When ξ grows faster than the logarithm of the system size, the problem becomes super-polynomially hard, making it practically unsolvable within reasonable timeframes, even by quantum machines. This finding underscores fundamental constraints in probing and understanding complex quantum phases, such as topological order and symmetry-protected topological phases, which are crucial for both theoretical physics and advancing quantum technologies. The researchers also point out that certain quantum states have well-defined phases that no efficient quantum experiment can reliably identify, revealing inherent limits in measurement and observation.
quantum-computingquantum-phasesquantum-materialstopological-orderquantum-technologycomputational-limitsquantum-statesQuantum study cracks decades-old mystery of trapped quantum electrons
A research team from TU Wien has resolved a longstanding puzzle in condensed matter physics regarding which electrons escape from a solid material when it is bombarded with electrons. While it was previously believed that electrons with sufficient energy would simply leave the material, experimental evidence showed discrepancies that energy alone could not explain. The study reveals the existence of specific quantum "doorway states" that govern electron emission. These doorway states are particular quantum states above the energy threshold that allow electrons to escape, acting as "open doors" to the outside, whereas other states with similar energy do not permit emission. The researchers demonstrated that not all electrons with enough energy can leave the solid; only those occupying these doorway states can do so. Additionally, some doorway states only appear when a material has more than five layers, highlighting the importance of material layering in electron emission behavior. This discovery not only clarifies why materials with similar electron energy levels can exhibit very different emission characteristics but also opens new avenues for designing layered materials with tailored electronic properties. The
materialsquantum-physicselectron-emissioncondensed-matter-physicsgrapheneenergy-statesquantum-materialsWorld’s first linked time crystal could supercharge quantum computers
European researchers at Aalto University in Finland have, for the first time, successfully connected a time crystal to an external system, marking a significant breakthrough in quantum technology. Time crystals are a novel phase of matter proposed by Nobel Laureate Frank Wilczek, characterized by perpetual motion in their lowest energy state without energy input. Previously, time crystals had only been observed in isolated quantum systems, but the Aalto team demonstrated that a time crystal formed from magnons in a superfluid helium-3 environment can interact with a mechanical oscillator. This connection allowed them to adjust the time crystal’s properties, a feat not achieved before. The experiment involved pumping magnons—quasiparticles behaving like individual particles—into the superfluid cooled near absolute zero, creating a time crystal that maintained motion for up to 108 cycles (several minutes). As the time crystal’s motion faded, it coupled with a nearby mechanical oscillator, with changes in frequency analogous to known optomechanical phenomena used in gravitational wave detection.
quantum-computingtime-crystalquantum-sensorsoptomechanical-systemsultracold-physicsquantum-materialslow-temperature-physicsNew molecular coating method improves quantum photon purity by 87%
Researchers at Northwestern University have developed a novel molecular coating technique that significantly enhances the purity and reliability of single-photon sources critical for quantum technologies. By applying a layer of PTCDA molecules onto tungsten diselenide, an atomically thin semiconductor known for its single-photon emission at atomic defects, the team achieved an 87% improvement in photon spectral purity. This coating protects the fragile quantum emitters from atmospheric contaminants like oxygen, which previously caused variability and noise in photon production, without altering the semiconductor’s intrinsic electronic properties. The PTCDA coating not only stabilizes the photon emission but also uniformly shifts the photon energy to lower levels, beneficial for quantum communication devices. This uniformity and improved control over photon emission are essential for developing scalable, tunable, and stable single-photon sources, which are foundational for quantum computing, sensing, and secure quantum communication networks. The researchers plan to extend this approach to other semiconductor materials and explore electrically driven photon emission, aiming to advance toward interconnected quantum networks and
quantum-materialsmolecular-coatingtungsten-diselenidesingle-photon-emittersquantum-communicationsemiconductor-materialsquantum-technologyUS Navy's new system reduces timeline for military quantum discoveries
The US Naval Research Laboratory (NRL) has introduced a new "cluster system" designed to accelerate research into advanced quantum materials by enabling the growth and analysis of materials at the atomic level within a single, contamination-free setup. This integrated system allows researchers to grow materials one atomic layer at a time and immediately study their structure and electronic properties without transferring samples between different facilities, thus improving efficiency and reducing contamination risks. The system incorporates a robotic transfer arm and multiple chambers connected by an ultra-high vacuum interface, facilitating techniques like molecular beam epitaxy, scanning tunneling microscopy, and angle-resolved photoemission spectroscopy to visualize atoms and map electronic band structures. The focus of this research is on quantum materials with unique properties governed by quantum mechanics, such as superconductors and topological insulators, which have promising applications in military and defense technologies including memory storage, sensors, and energy-efficient electronics. By enabling streamlined material growth and characterization, the cluster system is expected to significantly shorten the timeline from fundamental scientific discovery to
materialsquantum-materialsmolecular-beam-epitaxyrobotic-armelectronicssuperconductorstopological-insulatorsNovel polymer material can bring quantum devices out of cryogenic labs
Researchers from Georgia Institute of Technology and the University of Alabama have developed a novel conjugated polymer capable of sustaining quantum states at room temperature, potentially revolutionizing quantum device technology by eliminating the need for ultra-cold environments. Unlike traditional quantum materials that rely on rigid crystals like diamond or silicon carbide and require cryogenic cooling, this new polymer uses a carefully designed molecular chain composed of alternating donor and acceptor units—specifically dithienosilole and thiadiazoloquinoxaline. Incorporating a silicon atom into the donor unit induces a twist in the polymer chain, preventing tight stacking that would otherwise disrupt quantum coherence. Additionally, long hydrocarbon side chains improve solubility and maintain electronic coherence, enabling stable electron spin behavior essential for quantum applications. The team confirmed their design through theoretical modeling and experimental techniques. Simulations showed that as the polymer chain lengthened, it achieved a high-spin ground state with two unpaired electrons aligned, analogous to states used in solid-state qubits. Magnetometry and
materialspolymerquantum-devicesroom-temperature-quantum-coherenceconjugated-polymerquantum-statesquantum-materialsGoogle's quantum AI chip unlocks new exotic phase of matter
An international research team from the Technical University of Munich, Princeton University, and Google Quantum AI has experimentally observed a previously theorized exotic phase of matter—known as a Floquet topologically ordered state—using Google's 58-qubit quantum processor, Willow. This non-equilibrium quantum state arises in systems driven by time-periodic Hamiltonians, where the governing physical rules change in a predictable, cyclical manner. Unlike conventional phases of matter defined under equilibrium conditions, these out-of-equilibrium phases exhibit dynamic, time-evolving properties that traditional thermodynamics cannot describe. The team developed an interferometric algorithm to probe the topological structure of this state, enabling them to witness the dynamical transformation of exotic particles predicted by theory. This breakthrough demonstrates that quantum computers like Willow are not merely computational tools but also powerful experimental platforms for exploring complex quantum phenomena that are difficult or impossible to simulate classically. The discovery opens a new frontier in quantum simulation, transforming quantum processors into laboratories for investigating out-of-equilibrium quantum matter
quantum-computingexotic-matterquantum-AI-chipnon-equilibrium-quantum-statestopological-phasesGoogle-Quantum-AIquantum-materials3D-printed superconductors set new record in magnetic strength
Cornell researchers have developed a novel one-step 3D printing method to fabricate superconductors with record-setting magnetic performance. Using an ink composed of copolymers and inorganic nanoparticles that self-assemble during printing, followed by heat treatment, the team creates porous crystalline superconductors structured at atomic, mesoscopic, and macroscopic scales. This streamlined “one-pot” process bypasses traditional multi-step fabrication methods, enabling complex 3D shapes such as coils and helices while enhancing material properties through mesoscale confinement. A key achievement of this work is the printing of niobium nitride superconductors exhibiting an upper critical magnetic field of 40–50 Tesla—the highest confinement-induced value reported for this compound—crucial for applications like MRI magnets. The researchers established a direct correlation between polymer molar mass and superconductor performance, providing a design map for tuning properties. Graduate students and faculty from materials science and physics contributed to overcoming chemical and engineering challenges. Supported by the National Science Foundation and
3D-printingsuperconductorsmaterials-sciencenanotechnologyquantum-materialscopolymersmagnetic-strengthScientists observe new quantum behavior in superconducting material
Researchers have observed novel quantum behavior in the chromium-based kagome metal CsCr₃Sb₅, marking a significant advance in understanding superconductivity. Kagome metals feature a distinctive lattice geometry of corner-sharing triangles, which theoretically can host flat electronic bands—compact molecular orbitals that influence electron behavior. Unlike most kagome materials where these flat bands lie too far from active energy levels, in CsCr₃Sb₅ the flat bands actively participate in shaping the material’s superconducting and magnetic properties. This discovery confirms theoretical predictions and opens a pathway for engineering exotic superconductivity through precise chemical and structural control. The study, led by scientists from Rice University and Taiwan’s National Synchrotron Radiation Research Center and published in Nature Communications, combined advanced experimental techniques such as angle-resolved photoemission spectroscopy (ARPES) and resonant inelastic X-ray scattering (RIXS) with theoretical modeling. These methods revealed distinct signatures of the flat bands and their role in magnetic excitations, demonstrating
materialssuperconductivityquantum-materialskagome-latticeelectron-behaviorcondensed-matter-physicsadvanced-synthesis-techniquesScientists measure quantum distance in a solid for the first time ever
Scientists have, for the first time, experimentally measured the full quantum metric tensor of electrons in a real solid crystal, using black phosphorus. Quantum distance, a theoretical concept describing how similar or different two quantum states are, had long eluded direct measurement in materials due to the difficulty of capturing the subtle quantum geometry of electrons. By employing angle-resolved photoemission spectroscopy (ARPES) combined with synchrotron radiation at the Advanced Light Source, the researchers mapped the pseudospin texture of electrons in black phosphorus, enabling them to reconstruct the quantum distance and the full quantum metric tensor of Bloch electrons within the crystal. This breakthrough is significant because understanding quantum distances and the quantum metric tensor can illuminate anomalous quantum phenomena in solids, such as high-temperature superconductivity and resistance-free electrical conduction. Moreover, precise knowledge of quantum geometry is crucial for advancing quantum technologies, including the development of fault-tolerant quantum computers. While the current demonstration is limited to black phosphorus, the approach opens new avenues for exploring
materialsquantum-materialsblack-phosphorusquantum-distancesuperconductorsquantum-computingelectron-behaviorNew radiation-proof quantum state could unlock deep space travel
Researchers at the University of California, Irvine have discovered a new quantum phase of matter within a custom-synthesized material called hafnium pentatelluride. By subjecting this material to ultra-high magnetic fields of up to 70 Teslas—about 700 times stronger than a typical fridge magnet—at Los Alamos National Laboratory, the team observed a sudden loss of electrical conductivity, signaling a transition into this exotic state. This phase involves electrons pairing with positively charged holes to form a tightly-bound fluid of excitons that spin in unison, potentially enabling signals to be carried by spin rather than electrical charge. This discovery opens avenues for energy-efficient spin-based electronics and quantum devices. A key advantage of this new quantum state is its resistance to radiation, which could make it ideal for electronics used in deep-space missions where conventional semiconductors fail due to harsh radiation environments. The material’s robustness could lead to self-charging, radiation-proof computers and devices capable of long-term operation in space, addressing
quantum-materialsexotic-matterhafnium-pentatellurideenergy-efficient-technologyspin-based-electronicsradiation-resistant-electronicsdeep-space-travelScientists capture atomic motion on camera for the first time
Scientists have, for the first time, directly filmed atomic motion by capturing thermal vibrations of atoms in real-time using an advanced electron microscopy technique called electron ptychography. Led by Yichao Zhang from the University of Maryland, the team achieved a resolution finer than 15 picometers, allowing them to visualize moiré phasons—coordinated, heat-driven vibrations that occur in twisted two-dimensional (2D) materials. These subtle atomic motions, previously only theorized, play a crucial role in determining thermal conductivity and superconductivity in ultrathin quantum materials. This breakthrough provides unprecedented insight into how heat propagates through 2D materials and confirms long-standing hypotheses about atomic-scale dynamics. By revealing these vibrations, the research opens new avenues for engineering quantum materials with tailored thermal, electronic, and optical properties. Zhang’s team plans to further explore how defects and interfaces affect thermal vibrations, which could lead to advances in quantum computing and energy-efficient electronics. Published in Science on July 24,
materials-science2D-materialselectron-microscopyatomic-motionquantum-materialsthermal-vibrationselectron-ptychographyTurns out quantum secrets can’t be cracked by humans or AI alone
A team of physicists and machine learning (ML) experts collaborated to solve a longstanding puzzle in condensed matter physics involving frustrated magnets—materials whose magnetic components do not align conventionally and exhibit unusual behaviors. Specifically, they investigated what happens to a quantum spin liquid state in a type of magnet called a "breathing pyrochlore" when cooled near absolute zero. While the spin liquid state, characterized by constantly fluctuating magnetic moments, was known to exist, the researchers had been unable to determine its behavior at even lower temperatures. The breakthrough came through a novel AI-human collaboration. The ML algorithm, developed by experts at LMU Munich, was designed to classify magnetic orders and was particularly interpretable, requiring no prior training and working well with limited data. By feeding Monte Carlo simulation data of the cooling spin liquid into the algorithm, the team identified previously unnoticed patterns. They then reversed the simulations, effectively heating the magnetic state, which helped confirm the nature of the low-temperature phase. This iterative dialogue between
materialsquantum-materialsmachine-learningcondensed-matter-physicsquantum-magnetsspin-liquidsquantum-computingIndia eyes global quantum computer push — and QpiAI is its chosen vehicle
QpiAI, an Indian startup specializing in integrating AI with quantum computing for enterprise applications, has secured $32 million in a Series A funding round co-led by the Indian government under its $750 million National Quantum Mission and Avataar Ventures. Valued at $162 million post-money, this investment underscores India’s strategic push to become a global quantum computing leader. The National Quantum Mission, launched in 2023, targets the development of intermediate-scale quantum computers (50–1,000 qubits) and related quantum technologies such as satellite-based quantum communications and quantum materials over the next eight years. QpiAI, one of eight startups selected for government grants, has developed India’s first full-stack quantum computer, QpiAI-Indus, featuring 25 superconducting qubits, and integrates AI to enhance quantum chip design and error correction. Founded in 2019 and headquartered in Bengaluru with subsidiaries in the U.S. and Finland, QpiAI focuses on real-world quantum applications in sectors like
quantum-computingAI-integrationquantum-materialssuperconducting-qubitsquantum-hardwarematerial-discoveryquantum-device-fabricationScientists isolate lone spinon in breakthrough for quantum magnetism
Scientists have achieved a significant breakthrough in quantum magnetism by isolating a lone spinon, a quasiparticle previously thought to exist only in pairs. Spinons arise as quantum disturbances in low-dimensional magnetic systems, particularly one-dimensional spin chains, where flipping a single electron spin creates a ripple that behaves like a particle carrying spin ½. Historically, spinons were observed only in pairs, reinforcing the belief that they could not exist independently. However, a new theoretical study by physicists from the University of Warsaw and the University of British Columbia demonstrated that a single unpaired spin can move freely through a spin-½ Heisenberg chain, effectively acting as a solitary spinon. This theoretical finding gained experimental support from recent work led by C. Zhao, published in Nature Materials, which observed spin-½ excitations in nanographene-based antiferromagnetic chains consistent with lone spinon behavior. The ability to isolate and understand single spinons has profound implications for quantum science, as spinons are closely
quantum-magnetismspinonsquantum-materialsmagnetic-materialsquantum-computingnanographenequantum-entanglementQuantum leap promises 1,000x faster, silicon-free electronics
Researchers at Northeastern University have developed a quantum material, 1T-TaS₂, that can switch between conductive and insulating states on demand using a technique called thermal quenching—controlled heating and cooling—and light exposure. This breakthrough enables electronic switching speeds up to 1,000 times faster than current silicon-based processors, potentially moving from gigahertz to terahertz operation. Unlike silicon, which is reaching its physical limits in speed and miniaturization, this quantum material can perform both conductive and insulating functions within a single substance, controlled simply by light, eliminating the need for complex interfaces in electronics. This advancement could revolutionize electronics by enabling devices that are exponentially smaller, faster, and more efficient. The ability to manipulate quantum materials near room temperature, rather than at cryogenic temperatures, makes this approach more practical for real-world applications. Experts highlight that this innovation represents a paradigm shift in electronics design, complementing efforts in quantum computing and materials science to overcome the limitations of traditional silicon technology. The
quantum-materialssilicon-free-electronicsfaster-processorsthermal-quenchingconductive-materialsinsulating-materialselectronic-state-switchingQuantum ‘translator’: A tiny silicon chip links microwaves and light like never before
Researchers at the University of British Columbia have developed a tiny silicon chip that acts as a highly efficient quantum "translator," converting signals between microwaves (used in quantum computing) and light (used in communication) with up to 95% efficiency and almost zero noise. This conversion is crucial because microwaves, while integral to quantum computers, cannot travel long distances effectively, whereas optical photons can. The chip achieves this by incorporating tiny magnetic defects in silicon that trap electrons; these electrons flip states to mediate the conversion without absorbing energy, preserving the fragile quantum information and entanglement necessary for quantum communication. This innovation addresses a major challenge in creating a quantum internet, enabling quantum computers to remain entangled over long distances, potentially across cities or continents. Unlike previous devices, the UBC chip works bidirectionally, adds minimal noise, and operates with extremely low power consumption using superconducting materials. While still theoretical and requiring physical realization, this design represents a significant advance toward secure, ultra-fast quantum networks that
quantum-computingsilicon-chipquantum-communicationmicrowave-to-optical-conversionquantum-internetquantum-materialsphotonicsGraphene’s strange twist is a boon for true superconductivity: Study
The article discusses recent research on magic-angle twisted trilayer graphene (MATG), a novel form of graphene composed of three atom-thick layers twisted at specific angles, which exhibits unconventional superconductivity. Unlike traditional superconductors, MATG’s superconducting behavior defies established theories, making it a subject of intense scientific investigation. Researchers constructed Josephson junctions incorporating MATG to probe its superconducting properties beyond simple resistance measurements, confirming true superconductivity through observations such as magnetic field expulsion and Cooper pair formation. A key finding of the study is MATG’s exceptionally high kinetic inductance—about 50 times greater than most known superconductors—indicating that Cooper pairs in MATG respond very slowly to changing currents. This property is highly desirable for quantum technologies, including ultra-sensitive photon detectors and superconducting qubits for quantum computing. Additionally, the researchers identified an inverse relationship between kinetic inductance and critical current, shedding light on the coherence length of the superconducting electron pairs. Although MATG is not
materialsgraphenesuperconductivityquantum-devicestwisted-trilayer-graphenemagic-angle-graphenequantum-materialsQuantum embezzlement is hiding in known one-dimensional materials: Study
A recent study by researchers at Leibniz University Hannover in Germany has demonstrated that the phenomenon of quantum embezzlement—previously thought to exist only in idealized, infinite quantum systems—can actually occur in real, finite one-dimensional materials known as critical fermion chains. Quantum embezzlement is a unique form of entanglement where one system can supply entanglement to another, enabling state changes without itself being altered, analogous to borrowing resources without depletion. The study found that these critical fermion chains, which are highly entangled systems at phase transition points, satisfy the strict criteria for universal embezzlement, meaning they can assist in creating any entangled state across various scenarios. Importantly, the researchers showed that this embezzlement property is not limited to infinite systems (the thermodynamic limit) but also emerges in large, finite fermion chains that could be experimentally realized. This suggests that quantum embezzlement is not merely a theoretical curiosity but a physical effect
quantum-materialsfermion-chainsquantum-entanglementquantum-information-transferquantum-physicsquantum-embezzlementmaterials-scienceA new programmable platform decodes the selective spin of electrons
Researchers at the University of Pittsburgh have developed a novel programmable platform that replicates the conditions underlying the chiral-induced spin selectivity (CISS) effect, a quantum phenomenon where electrons exhibit spin-dependent transport when passing through chiral (twisted) molecules. This effect, first discovered in the late 1990s, has been observed in biological systems such as photosynthesis and cellular respiration but remained poorly understood due to the complexity and variability of real biomolecules. The new artificial system uses a layered material composed of lanthanum aluminate and strontium titanate, on which researchers "draw" spiral-like electron pathways using a microscopic probe that modulates voltage in sync with its movement, creating chiral waveguides that break mirror symmetry. This engineered platform allows precise control over the geometry and parameters of the chiral channels, enabling systematic study of spin-dependent quantum transport phenomena. Experiments revealed unusual conductance patterns and electron pairing behaviors consistent with theoretical models where spiral geometry induces spin-orbit coupling,
quantum-transportchiral-induced-spin-selectivityprogrammable-platformelectron-spinmaterials-sciencequantum-materialsenergy-applicationsWorld's smallest atomic-scale semiconductor produces solar hydrogen
semiconductorsolar-hydrogenphotocatalystquantum-materialsenergy-solutionsnanotechnologysustainable-energy