Abstract
Faithfully storing an unknown quantum light state is essential to advanced quantum communication and distributed quantum computation applications. The required quantum memory must have high fidelity to improve the performance of a quantum network. Here we report the reversible transfer of photonic polarization states into collective atomic excitation in a compact solid-state device. The quantum memory is based on an atomic frequency comb (AFC) in rare-earth ion-doped crystals. We obtain up to 0.999 process fidelity for the storage and retrieval process of single-photon-level coherent pulse. This reliable quantum memory is a crucial step toward quantum networks based on solid-state devices.
- Received 17 February 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.190505
© 2012 American Physical Society
Synopsis
Polarized Light in Safe Storage
Published 10 May 2012
New techniques for storing and retrieving polarized photons improve the quantum memory capabilities of rare-earth-doped crystals.
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