Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics I
Q 31.62: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1+2
Superradiance of Classical Fields via Projective Measurements — •Daniel Bhatti1,2, Steffen Oppel1, Ralph Wiegner1, Girish S. Agarwal3, 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 — 3Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA
We study the state evolution of the fields produced by classical sources, when recording intensity correlations of higher order in a generalized Hanbury Brown and Twiss setup [1]. Apart from an offset, we find that the angular distribution of the last detected photon is identical to the superradiant emission pattern generated by an ensemble of two-level atoms in entangled symmetric Dicke states. As a consequence, we demonstrate that the Hanbury Brown and Twiss effect, originally established in astronomy to determine the dimensions or distances of stars, and Dicke superradiance, commonly observed with atoms in symmetric Dicke states, are two sides of the same coin. We show that the phenomenon derives from projective measurements induced by the measurement of photons in the far field of the sources and the permutative superposition of quantum paths identical to those leading to superradiance in the case of single photon emitters [2].
[1] D. Bhatti, et al., Phys. Rev. A 94, 013810 (2016).
[2] R. Wiegner, et al., Phys. Rev. A 92, 033832 (2015).