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arXiv · 2211.01485

Information compression at the turbulent-phase transition in cold atom gases

R. Giampaoli·J. L. Figueiredo·J. D. Rodrigues·J. A. Rodrigues·H. Terças·J. T. Mendonça
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Abstract

The statistical properties of physical systems in thermal equilibrium are blatantly different from their far-from-equilibrium counterparts. In the latter, fluctuations often dominate the dynamics and might cluster in ordered patterns in the form of dissipative coherent structures. Here, we study the transition of a cold atomic cloud, driven close to a sharp electronic resonance, from a stable to a turbulent phase. From the atomic density distribution -- measured using a spatially-resolved pump-probe technique -- we have computed the Shannon entropy on two different basis sets. Information compression, corresponding to a minimum in the Shannon entropy, has been observed at criticality, where the system fluctuations organize into high-order (low-entropy) patterns. Being independent of the representation used, this feature is a property shared by a vast class of physical systems undergoing phase transitions.

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R. Giampaoli, J. L. Figueiredo, J. D. Rodrigues, J. A. Rodrigues, H. Terças, J. T. Mendonça. 2022-11-02. Information compression at the turbulent-phase transition in cold atom gases. https://arxiv.org/abs/2211.01485

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