Hydrodynamic superradiance in wave-mediated cooperative tunneling
Hydrodynamic superradiance in wave-mediated cooperative tunneling
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DOI：
10.1038/s42005-022-00918-y
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发表时间：
2022-06-08
影响因子：
5.5
通讯作者：
Labousse, Matthieu
中科院分区：
文献类型：
--
作者：
Papatryfonos, Konstantinos;Ruelle, Melanie;Labousse, Matthieu
当多个原子的光子发射速率因原子间相互作用而增强时，量子光学中就会出现超辐射。当两个原子之间的距离与发射波长相当时，原子处于纠缠状态，由于量子干涉，原子的发射率与原子之间的距离成正比。在这里，我们探索了导波流体力学的理论模型，在该模型中，液滴在振动槽的表面上自推进。当液滴被限制在两个流体动力腔之间时，在某些情况下，系统构成一个具有明确定义的基态和激发态的二能级系统。当两个这样的二能级系统通过一个介入腔耦合时，由于波的影响，态之间的跃迁几率可能增大或减小。此外，隧道几率随耦合腔长度呈正弦变化。因此，我们建立了量子超辐射的经典类比。我们已经利用导波流体力学来设计各种量子现象的经典类比。在这里，两个液滴之间的耦合被报道为与耦合的2原子系统的超辐射在性质上相似。
Superradiance occurs in quantum optics when the emission rate of photons from multiple atoms is enhanced by inter-atom interactions. When the distance between two atoms is comparable to the emission wavelength, the atoms become entangled and their emission rate varies sinusoidally with their separation distance due to quantum interference. We here explore a theoretical model of pilot-wave hydrodynamics, wherein droplets self-propel on the surface of a vibrating bath. When a droplet is confined to a pair of hydrodynamic cavities between which it may transition unpredictably, in certain instances the system constitutes a two-level system with well-defined ground and excited states. When two such two-level systems are coupled through an intervening cavity, the probability of transition between states may be enhanced or diminished owing to the wave-mediated influence of its neighbour. Moreover, the tunneling probability varies sinusoidally with the coupling-cavity length. We thus establish a classical analog of quantum superradiance.Pilot-wave hydrodynamics has been employed to design classical analogues of various quantum phenomena. Here, coupling between two liquid droplets is reported to show qualitative similarities to superradiance of a coupled 2-atom system.