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arXiv 1202.2776quant-phcond-mat.mes-hallphysics.atom-ph
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三能级或四能级系统与波导耦合产生的强关联光子

Strongly correlated photons generated by coupling a three- or four-level system to a waveguide

Huaixiu Zheng, Daniel J. Gauthier, Harold U. Baranger

摘要:

本文研究了在一维波导中通过原子与光子量子场的耦合产生强关联光子。具体来说,我们考虑原子的三能级或四能级系统。光子-光子束缚态的出现是由原子介导的强光子-光子关联的表现。光子之间可以产生有效的排斥或吸引相互作用,导致抑制多光子传输(光子阻断)或增强多光子传输(光子诱导隧穿)。因此,非经典光源可以通过将相干态发送到所提出的系统中来按需产生。我们计算了透射光场的二阶关联函数,观察到了束缚态引起的聚束和反聚束。此外,我们证明了该系统可以产生具有高度光谱纠缠度的光子对,这具有很大的信息承载能力,对于大字母表量子通信是重要的。

英文摘要:

We study the generation of strongly correlated photons by coupling an atom to photonic quantum fields in a one-dimensional waveguide. Specifically, we consider a three-level or four-level system for the atom. Photon-photon bound states emerge as a manifestation of the strong photon-photon correlation mediated by the atom. Effective repulsive or attractive interaction between photons can be produced, causing either suppressed multiphoton transmission (photon blockade) or enhanced multiphoton transmission (photon-induced tunneling). As a result, nonclassical light sources can be generated on demand by sending coherent states into the proposed system. We calculate the second-order correlation function of the transmitted field and observe bunching and antibunching caused by the bound states. Furthermore, we demonstrate that the proposed system can produce photon pairs with a high degree of spectral entanglement, which have a large capacity for carrying information and are important for large-alphabet quantum communication.

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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