Physics and Astronomy · Atomic and Molecular Physics, and Optics
Researchers used erbium-doped thin-film lithium niobate to build an on-chip quantum memory for telecom-band signals. It stored four time-bin modes and recovered single-photon-level qubits with 96.8% fidelity, although its storage efficiency was 1.95%.
Researchers have demonstrated an integrated quantum memory with 11 independently controlled channels in a europium-doped crystal. It stored three time-bin qubits with fidelity above 99% and five-dimensional path-encoded states with fidelity above 96%.
Researchers describe how a refractive-index boundary moving at the speed of light could trap weak light in time rather than in a fixed region of space. The approach could store, compress and reshape very weak pulses, including single photons, while allowing controlled release through a one-way channel.
