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Q: Fachverband Quantenoptik und Photonik
Q 34: Quantum Effects: Entanglement and Decoherence
Q 34.4: Vortrag
Mittwoch, 8. März 2017, 15:30–15:45, P 4
Subradiant Emission from Statistically Independent Classical Light Sources — •Daniel Bhatti1,2, Raimund Schneider1,2, Thomas Mehringer1,2, Steffen Oppel1, and Joachim von Zanthier1,2 — 1Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany — 2Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91052 Erlangen, Germany
Super- and subradiance, i.e., the cooperative emission of spontaneous radiation by an ensemble of identical two-level atoms, is one of the intriguing problems in quantum optics. While superradiance is usually observed from symmetric Dicke-states, subradiance is typically attributed to nonsymmetric Dicke-states [1]. Recent theoretical and experimental investigations of higher-order intensity correlations have shown that even thermal light sources (TLS) are able to emit superradiant light in particular directions [2,3]. Here, we investigate the Nth-order intensity correlation functions of N TLS for different detector configurations leading to the production of directional subradiance. By relating the phenomenon to subradiance of antisymmetric quantum states, we find that the classical directional subradiance reflects a quantum feature. We present the first measurements of directional subradiant emission from TLS confirming the theoretical predictions.
[1] R. H. Dicke, Phys. Rev. 93, 99 (1954).
[2] S. Oppel, et al., Phys. Rev. Lett. 113, 263606 (2014).
[3] D. Bhatti, et al., Phys. Rev. A 94, 013810 (2016).