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arXiv 2102.03757quant-phcond-mat.mes-hall
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非互易耦合原子阵列中束缚态和亚辐射态多原子激发

Bound and Subradiant Multi-Atom Excitations in an Atomic Array with Nonreciprocal Couplings

H. H. Jen

摘要:

当多激发态原子与波导界面的导模强耦合时,原子的集体衰变在空间中成为亚辐射和束缚态。在这个界面上,我们通过Kubo累积展开分析了它们的平均密度-密度和修正的三阶关联,这些关联可以产生并持续很长时间。保形二聚体和三聚体的原子激发出现在最次辐射耦合制度的光诱导偶极-偶极相互作用。这导致在编码的非互易自旋扩散中的量子信息处理和量子存储的潜在应用,其中其扩散速度取决于激发原子之间的初始相干性并且对它们的相对相位波动是鲁棒的。在这个接口中,状态相关的光子路由也是可行的。

英文摘要:

Collective decays of multiply-excited atoms become subradiant and bound in space when they are strongly coupled to the guided modes in an atom-waveguide interface. In this interface, we analyze their average density-density and modified third-order correlations via Kubo cumulant expansions, which can arise and sustain for long time. The shape-preserving dimers and trimers of atomic excitations emerge in the most subradiant coupling regime of light-induced dipole-dipole interactions. This leads to a potential application of quantum information processing and quantum storage in the encoded nonreciprocal spin diffusion, where its diffusion speed depends on the initial coherence between the excited atoms and is robust to their relative phase fluctuations. The state-dependent photon routing can be viable as well in this interface.

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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