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Characterization of Planetary Atmospheres
Karan Molaverdikhani
Fri, 21 Jun 2019, 15:00
Fundamental Physics with High-Energy Cosmic Neutrinos
Dr. Mauricio Bustamante
Mon, 24 Jun 2019, 16:30
Lynton Ardizzone
Tue, 25 Jun 2019, 14:15

Many body chaos near a second order thermal phase transition

Alexander Schuckert , Technische Universität München
Chaos is one way of seeing why classical systems thermalize: details about the initial state are effectively forgotten as trajectories diverge exponentially quickly. Recently, the study of out-of-time-ordered correlation functions (OTOCs) in quantum mechanical systems has generalized the notion of chaos to many-body systems. Here, we study the classical analogue of OTOCs near the second order thermal phase transition of a real scalar field theory in two spatial dimensions. We show that even in this regime without well-defined quasi-particles, the OTOC exhibits a lightcone-like behaviour as has been previously found in quantum systems. We reveal a transition to chaos in the symmetric phase and a local maximum of the Lyapunov exponent (the
Cold Quantum Coffee
18 Dec 2018, 10:00
Institut für Theoretische Physik, Phil16

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