Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 18: Quantum Effects: Cavity QED I

Q 18.3: Vortrag

Dienstag, 7. März 2017, 11:30–11:45, P 4

Hyperradiance from two atoms coupled to a single-mode cavity — •Marc-Oliver Pleinert1,2,3, Joachim von Zanthier1,3, and Girish S. Agarwal2,41Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany — 2Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA — 3Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91052 Erlangen, Germany — 4Institute for Quantum Science and Engineering and Department of Biological and Agricultural Engineering, Texas A&M University, College Station, Texas 77843, USA

We investigate the radiative characteristics of a system consisting of two coherently driven atoms coupled to a single-mode cavity, an ideal setup to study aspects of collective behavior over a wide range of coupling parameters. We show that this fundamental setup can distinctly exceed the free-space superradiant behavior, what we call hyperradiance. The phenomenon is accompanied by strong quantum fluctuations and thus cannot be described by a (semi-)classical treatment. Surprisingly, hyperradiance 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.

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