Quantum Memory for Microwave Photons in an Inhomogeneously Broadened Spin Ensemble

TY - JOUR

T1 - Quantum Memory for Microwave Photons in an Inhomogeneously Broadened Spin Ensemble

AU - Julsgaard, Brian

AU - Grezes, Cécile

AU - Bertet, Patrice

AU - Mølmer, Klaus

PY - 2013/6/18

Y1 - 2013/6/18

N2 - 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.

AB - 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.

KW - quant-ph

U2 - 10.1103/PhysRevLett.110.250503

DO - 10.1103/PhysRevLett.110.250503

M3 - Journal article

C2 - 23829721

SN - 0031-9007

VL - 110

SP - 250503

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

ER -