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arXiv · 2004.08398

Measuring the dynamics of a first order structural phase transition between two configurations of a superradiant crystal

Xiangliang Li·Davide Dreon·Philip Zupancic·Alexander Baumgärtner·Andrea Morales·Wei Zheng·Nigel R. Cooper·Tobias Donner·Tilman Esslinger
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Abstract

We observe a structural phase transition between two configurations of a superradiant crystal by coupling a Bose-Einstein condensate to an optical cavity and applying imbalanced transverse pump fields. We find that this first order phase transition is accompanied by transient dynamics of the order parameter which we measure in real-time. The phase transition and the excitation spectrum can be derived from a microscopic Hamiltonian in quantitative agreement with our experimental data.

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Xiangliang Li, Davide Dreon, Philip Zupancic, Alexander Baumgärtner, Andrea Morales, Wei Zheng, Nigel R. Cooper, Tobias Donner, Tilman Esslinger. 2020-04-17. Measuring the dynamics of a first order structural phase transition between two configurations of a superradiant crystal. https://doi.org/10.1103/physrevresearch.3.l012024

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