arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0612057quant-ph
收藏

非共振受激喇曼散射中原子系综的介观纠缠

Mesoscopic entanglement of atomic ensembles through non-resonant stimulated Raman scattering

Wenhai Ji, Chunbai Wu, S. J. van Enk, M. G. Raymer

摘要:

提出了一种利用非共振受激拉曼散射产生和验证两原子系综介观纠缠的方案。纠缠可以通过直接检测或平衡零差检测来自两个池的斯托克斯场,在它们在分束器上干涉之后产生。在读出过程中,集体原子场的纠缠可以转移到反斯托克斯场。通过测量反斯托克斯光场的算符矩,我们可以验证纠缠的存在。我们模拟的实际因素,如斯托克斯场探测器的量子效率和附加的热噪声在纠缠产生过程中的影响,和反斯托克斯场的损失在纠缠验证过程中,并找到可实现的制度,其中纠缠可以验证在几十到几百个原子激发的合奏。

英文摘要:

We propose a scheme of generating and verifying mesoscopic-level entanglement between two atomic ensembles using non-resonant stimulated Raman scattering. Entanglement can be generated by direct detection or balanced homodyne detection of the Stokes fields from the two cells, after they interfere on a beam splitter. The entanglement of the collective atomic fields can be transferred to the anti-Stokes fields in a readout process. By measuring the operator moments of the anti-Stokes fields, we can verify the presence of entanglement. We model the effects of practical factors such as Stokes field detector quantum efficiency and additive thermal noise in the entanglement generating process, and anti-Stokes field losses in the entanglement verification process, and find achievable regimes in which entanglement can be verified at the levels of tens to hundreds of atomic excitations in the ensembles.

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。

↑