Light-Matter Decoupling in the Deep Strong Coupling Regime: The Breakdown of the Purcell Effect

被引:182
作者
De Liberato, Simone [1 ]
机构
[1] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
关键词
Electrodynamics - Quantum electronics;
D O I
10.1103/PhysRevLett.112.016401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Improvements in both the photonic confinement and the emitter design have led to a steady increase in the strength of the light-matter coupling in cavity quantum electrodynamics experiments. This has allowed us to access interaction-dominated regimes in which the state of the system can only be described in terms of mixed light-matter excitations. Here we show that, when the coupling between light and matter becomes strong enough, this picture breaks down, and light and matter degrees of freedom totally decouple. A striking consequence of such a counterintuitive phenomenon is that the Purcell effect is reversed and the spontaneous emission rate, usually thought to increase with the light-matter coupling strength, plummets instead for large enough couplings.
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页数:5
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