Scientists manage to read information stored in Majorana qubits

Researchers from the Spanish National Research Council (CSIC) have successfully demonstrated a method to read information stored in Majorana qubits, a type of topological qubit known for their robustness against local noise and decoherence. Using a novel technique called quantum capacitance, the team was able to access the non-local quantum information encoded in pairs of Majorana zero modes. This approach acts as a global probe sensitive to the overall state of the system, overcoming the experimental challenge of detecting quantum information that is not localized at any specific point. Published in Nature, the study details how coupling two Majoranas and measuring their parity in real time reveals random telegraph switching with lifetimes exceeding one millisecond, indicating strong parity coherence. The experiment confirmed that the two parity states are charge neutral and indistinguishable by local probes, validating the protection principle inherent to topological qubits. This breakthrough establishes a crucial readout step for time-domain control of Majorana qubits and marks significant progress toward practical quantum computing applications based