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arXiv 2007.07844quant-ph
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坏腔极限下的双光子相互作用效应

Two-photon-interaction effects in the bad-cavity limit

Nicolò Piccione, Simone Felicetti, Bruno Bellomo

AI总结:

本研究探讨了坏腔极限下阻尼量子谐振子与二能级系统间的双光子耦合,应用绝热消除技术推导出有效主方程,揭示了其相比偶极相互作用在发射率增强和有效温度增加上的差异及显著动力学效应。

摘要:

各种实验平台已被证明是实现非偶极光与物质相互作用的有效测试平台,其中原子系统与受限模式通过双光子耦合发生相互作用。在此,我们研究了一个阻尼量子谐振子,在有限温度热浴以及相干和非相干驱动存在的情况下,在所谓的坏腔极限中,通过双光子耦合与 $N$ 个二能级系统发生相互作用。我们成功应用最近开发的绝热消除技术,推导出了二能级系统的有效主方程,与偶极相互作用的情况相比,呈现出两个根本差异:二能级系统自发辐射样发射率的增强(包括热贡献和相干驱动的二次项),以及二能级系统感知到的有效温度的增加。这些差异在二能级系统动力学中引起了显著效应,包括稳态相干的更快产生,以及集体效应对温度的更丰富依赖性,这种集体效应在更高温度下可以变得更强。

英文摘要:

Various experimental platforms have proven to be valid testbeds for the implementation of nondipolar light-matter interactions, where atomic systems and confined modes interact via two-photon couplings. Here, we study a damped quantum harmonic oscillator interacting with $N$ two-level systems via a two-photon coupling in the so-called bad-cavity limit, in the presence of finite-temperature baths and coherent and incoherent drivings. We have succeeded in applying a recently developed adiabatic elimination technique to derive an effective master equation for the two-level systems, presenting two fundamental differences compared to the case of a dipolar interaction: an enhancement of the two-level systems spontaneous-like emission rate, including a thermal contribution and a quadratic term in the coherent driving, and an increment of the effective temperature perceived by the two-level systems. These differences give rise to striking effects in the two-level systems dynamics, including a faster generation of steady-state coherence and a richer dependence on temperature of the collective effects, which can be made stronger at higher temperature.

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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