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arXiv 0808.3603quant-ph
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光子偏振态的预示单磁振子量子存储

Heralded single-magnon quantum memory for photon polarization states

Haruka Tanji, Saikat Ghosh, Jonathan Simon, Benjamin Bloom, Vladan Vuletić

摘要:

我们展示了一种基于光子偏振态映射到两个空间重叠的原子系综之间共享的单个集体自旋激发(磁振子)的预示量子存储器。通过量子态层析测量,对于任何输入偏振,偏振保真度都大于90(2)%,这远远超过了2/3的经典极限。这个过程也构成了一个量子非破坏性探测器,它可以探测和再生光子,而不会触及它的(可能是不确定的)偏振。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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