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COLOQUIO DEL 02/12: Thermodynamics and order beyond equilibrium --from eigenstate thermalisation to time crystals

TÍTULO: Thermodynamics and order beyond equilibrium --from eigenstate thermalisation to time crystals (coloquio en INGLÉS)

EXPOSITOR: Prof. Dr. Roderich Moessner, Max Planck Institute for the Physics of Complex Systems

FECHA Y HORA: Viernes 2 de diciembre de 2022, 14:30 hs


Salón de Actos del Instituto Balseiro (con aforo) Av. Bustillo km 9,5, San Carlos de Bariloche.

El evento será transmitido en vivo por el canal de YouTube "Instituto Balseiro Coloquios":


The field of thermodynamics is one of the crown jewels of classical physics. Thanks to the advent of experiments in cold atomic systems with long coherence times, our understanding of the connection of thermodynamics to quantum statistical mechanics has seen remarkable progress.

Extending these ideas and concepts to the non-equilibrium setting is a challenging topic, in itself of perennial interest. Here, we present perhaps the simplest non-equilibrium class of quantum problems, namely Floquet systems, i.e. systems whose Hamiltonians depend on time periodically, H(t + T) = H(t). For these, there is no energy conservation, and hence not even a natural concept of temperature.

We find that certain structures from equilibrium thermodynamics are lost, while entirely new non-equilibrium phenomena can arise, including a spectacular spatiotemporal `time-crystalline' form of order, recently observed experimentally on google AI's sycamore NISQ platform.

References: for an introductory overview, see Nature Physics 13, 424–428 (2017). For an in-depth review, see arxiv:1910.10745 . NISQ experiment: Nature 601, 531 (2022).


Dr. Roderich Moessner is B.A. (Honours), Class I in Physics, Oxford University; and PhD in Theoretical Physics, Oxford University.

Since 2008 is Honorarprofessor at Technical University Dresden, and since 2007 Director of Max Planck Institute for the Physics of Complex Systems, Dresden.

Previously he worked in Oxford University, Ecole Normale Supérieure (Paris), Princeton University and McMaster University.

He received numerous scholarships, prizes and distinctions:

Honorary Fellow, Hertford College, Oxford, 2019; Physical Review E 25th Anniversary Milestone article 2018 for the year 2013; Gottfried Wilhelm Leibniz Prize 2013 of the Deutsche Forschungsgemeinschaft; European Physical Society Condensed Matter Division Europhysics Prize 2012; Fellow of the American Physical Society; Domus Senior Scholar, Merton College, Oxford University; Scott Prize of Oxford University, 1994; Scholar of the German National Scholarship Foundation (Studienstiftung).

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