Quantum memory effects in atomic ensembles coupled to photonic cavities
Quantum memory effects in atomic ensembles coupled to photonic cavities
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DOI：
10.1116/5.0137078
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发表时间：
2022-11
期刊：
影响因子：
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通讯作者：
Adam Burgess;Marian Florescu
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文献类型：
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作者：
Adam Burgess;Marian Florescu
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的动力学。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，增强的能量转移，以及通过调节环境自由度来调制原子系统振荡的能力。我们还分析了一个由三原子链嵌入光子腔组成的结构。同样，我们发现一个强大的增强链的两端之间的能量转移速率，并确定特定的初始条件，导致显着减少链的末端的两个原子之间的耗散。另一种感兴趣的配置由两个对称失谐水库相对于原子系统。在单原子情况下，我们证明了通过调节系统的库失谐量来提高系统的衰变率是可能的。相比之下，在多原子的情况下，这导致类似于非共振腔的动力学。最后，我们检查的有效性旋转波近似通过对数值精确的分层运动方程的直接比较。我们发现在弱耦合制度，而在中间耦合制度，我们确定定性的相似性，但旋转波近似变得不太可靠。在中等耦合区域，我们发现由于混合光子-原子态的形成而导致稳态的偏离。
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.