Fundamental trade-off between the speed of light and the Fano factor of photon current in three-level lambda systems

Fundamental trade-off between the speed of light and the Fano factor of photon current in three-level lambda systems
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三能级 lambda 系统中光速与光子电流法诺因子之间的基本权衡

DOI:
10.1088/1751-8121/acb029
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发表时间:
2023
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
通讯作者:
Hyeon, Changbong
Hyeon, Changbong
中科院分区:
--
文献类型:
--
作者:
Singh, Davinder;Jang, Seogjoo J;Hyeon, Changbong

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电磁感应慢光介质是一种很有前途的量子存储器件系统,但控制其噪声水平仍然是一个需要克服的主要挑战。本文考虑了这种介质的最简单模型,即由三能级Λ系统与玻色浴相互作用组成的模型,并给出了光的群速度与辐射跃迁引起的光子流Fano因子之间的新的基本折衷关系。考虑到新导出的Lindblad型方程的稳态极限,我们发现光子流的Fano因子在光的最小群速度处最大化为3,这与表征介质的参数的详细值无关。
Electromagnetically induced slow-light medium is a promising system for quantum memory devices, but controlling its noise level remains a major challenge to overcome. This work considers the simplest model for such medium, comprised of three-level Λ-systems interacting with bosonic bath, and provides a new fundamental trade-off relation in light–matter interaction between the group velocity of light and the Fano factor of photon current due to radiative transitions. Considering the steady state limits of a newly derived Lindblad-type equation, we find that the Fano factor of the photon current maximizes to 3 at the minimal group velocity of light, which holds true universally regardless of detailed values of parameters characterizing the medium.
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DOI: --
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