Quantum memory for microwave photons in an inhomogeneously broadened spin ensemble

2013/01/08 by Brian Julsgaard, Cécile Grezes, Patrice Bertet +1 · 3 citations
Physics and Astronomy · #quant-ph

paper · pdf · doi:10.1103/physrevlett.110.250503

published as Phys. Rev. Lett. 110, 250503 (2013) · 5 pages, 4 figures, 11 pages supplementary material

arxiv created 2013/01/08 · arxiv updated 2013/06/20

Abstract

We propose a multi-mode quantum memory protocol able to store the quantum state of the field in a microwave resonator into an ensemble of electronic spins. The stored information is protected against inhomogeneous broadening of the spin ensemble by spin-echo techniques resulting in memory times orders of magnitude longer than previously achieved. By calculating the evolution of the first and second moments of the spin-cavity system variables for realistic experimental parameters, we show that a memory based on NV center spins in diamond can store a qubit encoded on the |0> and |1> Fock states of the field with 80% fidelity.

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