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Spontaneous symmetry breaking and phase coherence of a photon Bose-Einstein condensate coupled to a reservoir by Schmitt, Julian; Damm, Tobias; Dung, David; Wahl, Christian; Vewinger, Frank; Klaers, Jan; Weitz, Martin is a scholarly article available to read on EtoBox.

What is Spontaneous symmetry breaking and phase coherence of a photon Bose-Einstein condensate coupled to a reservoir about?

We examine the phase evolution of a Bose-Einstein condensate of photons generated in a dye microcavity by temporal interference with a phase reference. The photo-excitable dye molecules constitute a reservoir of variable size for the condensate particles, allowing for grand canonical statistics with photon bunching, as in a lamp-type source. We directly observe phase jumps of the condensate associated with the large statistical number fluctuations and find a separation of correlation timescales. For large systems, our data reveals phase coherence and a spontaneously broken symmetry, despite the statistical fluctuations.

Author

Schmitt, Julian; Damm, Tobias; Dung, David; Wahl, Christian; Vewinger, Frank; Klaers, Jan; Weitz, Martin

Published

2015

Language

EN