Dynamical phase transition in the open Dicke model

15 January 2015

Photo: AG Hemmerich

The Dicke model with a weak dissipation channel is realized by coupling a Bose-Einstein condensate to an optical cavity with ultra-narrow bandwidth. We explore the dynamical critical properties of the Hepp-Lieb-Dicke phase transition by performing quenches across the phase boundary. We observe hysteresis in the transition between a normal phase and a self-organized collective phase with an enclosed loop area showing power law scaling with respect to the quench time, which suggests an interpretation within a general framework introduced by Kibble and Zurek.

PNAS 112, 3290 (2015)

http://arxiv.org/abs/1409.1945 (2014)

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