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Superconducting Qubits Photonic Quantum Computing Quantum Foundations

Entanglement of light-shift compensated atomic spin waves with telecom light

arXiv

Authors: Y. O. Dudin, A. G. Radnaev, R. Zhao, J. Z. Blumoff, T. A. B. Kennedy, A. Kuzmich

Year

2010

Paper ID

11189

Status

Preprint

Abstract Read

~2 min

Abstract Words

117

Citations

N/A

Abstract

Entanglement of a 795 nm light polarization qubit and an atomic Rb spin wave qubit for a storage time of 0.1 s is observed by measuring the violation of Bell's inequality S = 2.65 pm 0.12. Long qubit storage times are achieved by pinning the spin wave in a 1064 nm wavelength optical lattice, with a magic-valued magnetic field superposed to eliminate lattice-induced dephasing. Four-wave mixing in a cold Rb gas is employed to perform light qubit conversion between near infra red (795 nm) and telecom (1367 nm) wavelengths, and after propagation in a telecom fiber, to invert the conversion process. Observed Bell inequality violation S = 2.66 pm 0.09, at 10 ms storage, confirms preservation of memory/light entanglement through the two stages of light qubit frequency conversion.

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Entanglement of a 795 nm light polarization qubit and an atomic Rb spin wave qubit for a storage time of 0.1 s is observed by measuring the violation of Bell's inequality S =...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1009.4180 [2] arXiv https://arxiv.org/abs/1009.4180 [3] Publisher https://arxiv.org/abs/1009.4180

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