Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Poster: Quantum Optics and Photonics I
Q 11.31: Poster
Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof
Superbunching and Nonclassicality as new Hallmarks of Superradiance — •Daniel Bhatti1,3, Joachim von Zanthier1,3, and Girish S. Agarwal2 — 1Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany — 2Department of Physics, Oklahoma State University, Stillwater, OK, USA — 3Erlangen Graduate School in Advanced Optical Technologies (SAOT), Universität Erlangen-Nürnberg, 91052 Erlangen, Germany
Superradiance, i.e., spontaneous emission of coherent radiation by an ensemble of two-level atoms in collective states introduced by Dicke in 1954 [1], is one of the enigmatic problems of quantum optics. The startling gist is that even though the atoms have no dipole moment they radiate with increased intensity in particular directions [2]. Following the advances in our understanding of superradiant emission by atoms in entangled W-states we examine the quantum statistical properties of superradiance [3]. This requires the investigated system to have at least two excitations. We present results for the spatially resolved photon-photon correlations of systems prepared in doubly excited W-states and give conditions when the atomic system emits nonclassial light. Moreover, we derive conditions for the occurrence of the rare phenomenon of superbunching. Both effects can be witnessed equally in the photon-photon cross correlations of the spontaneously scattered light and highlight the nonclassicalty of such correlations.
[1] R. H. Dicke, Phys. Rev. 93, 99 (1954).
[2] R. Wiegner, et al., Phys. Rev. A 84, 023805 (2011).
[3] D. Bhatti, et al., arXiv:1511.00956 (2015).