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arXiv 2103.01138quant-ph
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来自暗原子的连续量子光

Continuous quantum light from a dark atom

Karl Nicolas Tolazzi, Bo Wang, Christopher Ianzano, Jonas Neumeier, Celso Jorge Villas-Boas, Gerhard Rempe

摘要:

循环过程在从激光到拓扑绝缘体的许多物理学领域都很重要,经常为相应系统的动力学和结构方面提供令人惊讶的见解。本文报道了一个量子非线性波混合实验,在该实验中,共振激光器和光学腔定义了单个原子的几个基态和激发态之间的闭合循环。结果表明,在强原子-腔耦合和稳态驱动下,原子态和腔内光子数之间的纠缠通过量子干涉抑制了激发态布居,有效地减少了到原子基态的周期.然后,系统动力学由纠缠暗态的谐波梯内的跃迁(每个腔光子数对应一个)和量子芝诺封锁(在从腔发射的光子中产生反聚束)产生。减少的周期抑制不需要的光泵浦到周期外的原子状态,从而增加发射光子的数量。

英文摘要:

Cycling processes are important in many areas of physics ranging from lasers to topological insulators, often offering surprising insights into dynamical and structural aspects of the respective system. Here we report on a quantum-nonlinear wave-mixing experiment where resonant lasers and an optical cavity define a closed cycle between several ground and excited states of a single atom. We show that, for strong atom-cavity coupling and steady-state driving, the entanglement between the atomic states and intracavity photon number suppresses the excited-state population via quantum interference, effectively reducing the cycle to the atomic ground states. The system dynamics then result from transitions within a harmonic ladder of entangled dark states, one for each cavity photon number, and a quantum Zeno blockade that generates antibunching in the photons emitted from the cavity. The reduced cycle suppresses unwanted optical pumping into atomic states outside the cycle, thereby enhancing the number of emitted photons.

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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