Quantum reaction-diffusion systems (Prof. Igor Lesanovsky)

  • Date: May 2, 2023
  • Time: 02:30 PM (Local Time Germany)
  • Speaker: Prof. Igor Lesanovsky
  • Eberhard Karls-Universität Tübingen
  • Location: Max Planck Institute of Quantum Optics
  • Room: Herbert Walther Lecture Hall
Ongoing progress in the control of cold atomic gases continuously offers new opportunities for creating and probing quantum matter. In this talk I will discuss how these advances put us into position to investigate the impact of quantum effects on collective behavior and the long-time dynamics of many-body systems out of equilibrium.

I will focus mainly on two instances: the contact process [1], which is a simple model for epidemic spreading, and lattice gases
featuring two-body annihilation [2]. In both settings the introduction of non-classical effects, such as coherence, appears to alter emergent dynamical behavior. This manifests in a change of static and dynamical critical exponents, which can in principle be probed on lattice quantum simulators with Rydberg and ground state atoms. The particular challenge is (also for theory) that an unambiguous identification of these signatures requires the study of large quantum many-body systems at long times.

[1] F. Carollo, E. Gillman, H. Weimer and I. Lesanovsky, Critical behavior of the quantum contact process in one dimension, Physical Review Letters 123, 100604 (2019)

[2] G. Perfetto, F. Carollo, J.P. Garrahan and I. Lesanovsky, Reaction-limited quantum reaction-diffusion dynamics, arXiv:2209.09784 (2022)

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