Hyperradiance from collective behavior of coherently driven atoms

Abstract

The collective behavior of ensembles of atoms has been studied in-depth since the seminal paper of Dicke [R. H. Dicke, Phys. Rev. 93, 99 (1954)], where he demonstrated that a group of emitters in collective states is able to radiate with increased intensity and modified decay rates in particular directions, a phenomenon which he called superradiance. Here, we show that the fundamental setup of two atoms coupled to a single-mode cavity can be distinctly exceeding the free-space superradiant behavior, a phenomenon which we call hyperradiance. The effect is accompanied by strong quantum fluctuations and surprisingly arises for atoms radiating out-of-phase, an alleged non-ideal condition, where one expects subradiance. We are able to explain the onset of hyperradiance in a transparent way by a photon cascade taking place among manifolds of Dicke states with different photon numbers under particular out-of-phase coupling conditions. The theoretical results can be realized with current technology and thus should stimulate future experiments.

8 pages, 5 figures. Extended article on the radiation characteristics part of arXiv:1608.00137v1

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• Phase Control of the Quantum Statistics of Collective Emission
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• Electromagnetic control of nonclassicality in cavity QED system
• Collective enhancements in many-emitter phonon lasing
• Multiphoton blockade and antibunching in an optical cavity coupled with dipole-dipole interacting $\Lambda$-type atoms
• Coherent Control of Collective Spontaneous Emission through Self-interference
• Quantum Light on Demand
• Squeezed light generated with hyperradiance without nonlinearity
• Photon antibunching in a cavity-QED system with two Rydberg-Rydberg interaction atoms
• Radiation trapping effect versus superradiance in quantum simulation of light-matter interaction
• A numerical study of the spatial coherence of light in collective spontaneous emission
• The Observation of hyperradiance accompanied by enhanced entanglement in a hybrid optomechanical system
• Experimental observation of subabsorption