耦合到光子腔的原子系综中的量子记忆效应

IF 4.2 Q2 QUANTUM SCIENCE & TECHNOLOGY
Adam Burgess, Marian Florescu
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引用次数: 0

摘要

本文探讨了与洛伦兹光子腔系统对称耦合的多体原子系统动力学。我们的研究揭示了有趣的动力学特性,包括非零稳态、超辐射衰变、增强的能量传递,以及通过调节环境自由度来调制原子系统振荡的能力。我们还分析了由嵌入在光子腔中的三原子链组成的构型。同样,我们发现链两端之间的能量传递速率有很强的增强,并确定了导致链末端两个原子之间耗散显著减少的特定初始条件。另一个令人感兴趣的结构是由两个对称的失谐的原子系统组成的。在单原子的情况下,我们证明了通过调制它的库失谐来提高系统的衰减率是可能的。相反,在多原子的情况下,这导致了类似于非谐振腔的动力学。最后,我们通过与数值精确的运动层次方程的直接比较来检验旋转波近似的有效性。在弱耦合状态下,我们发现了很好的一致性,而在中耦合状态下,我们发现了定性相似性,但旋转波近似变得不太可靠。在中等耦合状态下,由于混合光子-原子态的形成,我们发现了稳态的偏差。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantum memory effects in atomic ensembles coupled to photonic cavities
This article explores the dynamics of many-body atomic systems symmetrically coupled to Lorentzian photonic cavity systems. Our study reveals interesting dynamical characteristics, including non-zero steady states, super-radiant decay, enhanced energy transfer, and the ability to modulate oscillations in the atomic system by tuning environmental degrees of freedom. We also analyze a configuration consisting of a three-atom chain embedded in a photonic cavity. Similarly, we find a strong enhancement of the energy transfer rate between the two ends of the chain and identified specific initial conditions that lead to significantly reduced dissipation between the two atoms at the end of the chain. Another configuration of interest consists of two symmetrical detuned reservoirs with respect to the atomic system. In the single atom case, we show that it is possible to enhance the decay rate of the system by modulating its reservoir detuning. In contrast, in the many-atom case, this results in dynamics akin to the on-resonant cavity. Finally, we examine the validity of the rotating wave approximation through a direct comparison against the numerically exact hierarchical equations of motion. We find good agreement in the weak coupling regime, while in the intermediate coupling regime, we identify qualitative similarities, but the rotating wave approximation becomes less reliable. In the moderate coupling regime, we find deviations of the steady states due to the formation of mixed photon-atom states.
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CiteScore
9.90
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