Heralded single-magnon quantum memory for photon polarization states

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We demonstrate a heralded quantum memory based on mapping of a photon polarization state onto a single collective-spin excitation (magnon) shared between two spatially overlapped atomic ensembles. The polarization fidelity is measured by quantum state tomography to be above 90(2)% for any input polarization, which far exceeds the classical limit of 2/3. The process also constitutes a quantum non-destructive probe that detects and regenerates a photon without touching its - potentially undetermined - polarization.

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Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/167791

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0808.3603
 http://arxiv.org/abs/0808.3603

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arXiv