Researchers Advance Quantum-memory-retention Time

摘要

Researchers at the Georgia Institute of Technology have announced a significant advance in the retention time of multiatom quantum-memory devices-from a previous maximum of 32 μsec to 7 msec. The significance of the advance is that, with retention time of milliseconds, a bit in quantum memory now lastsrnlonger than the time it would take a photon to travel through 100 km of optical fiber from one repeater to another in a long-range quantum network. Quantum networks function by distributing entangled quantum qubits between two repeaters, so modifying the qubit on one end modifies it on the other end, as well.