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arXiv · 1612.06534

Non-equilibrium phase transition in a spin-1 Dicke model

Zhang Zhiqiang·Chern Hui Lee·Ravi Kumar·K. J. Arnold·Stuart J. Masson·A. S. Parkins·M. D. Barrett
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Abstract

We realize a spin-1 Dicke model using magnetic sub-levels of the lowest F=1 hyperfine level of $^{87}$Rb atoms confined to a high finesse cavity. We study this system under conditions of imbalanced driving, which is predicted to have a rich phase diagram of nonequilibrium phases and phase transitions. We observe both super-radiant and oscillatory phases from the cavity output spectra as predicted by theory. Exploring the system over a wide range of parameters, we obtain the boundaries between the normal, super-radiant and the oscillatory phases, and compare with a theoretical model.

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Zhang Zhiqiang, Chern Hui Lee, Ravi Kumar, K. J. Arnold, Stuart J. Masson, A. S. Parkins, M. D. Barrett. 2016-12-20. Non-equilibrium phase transition in a spin-1 Dicke model. https://arxiv.org/abs/1612.06534

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