Noncommuting conserved charges in quantum thermodynamics and beyond

Abstract: Quantum simulators have recently enabled experimental observations of the internal thermalization of quantum many-body systems. Often, the global energy and particle number are conserved and the system is prepared with a well-defined particle number—in a microcanonical subspace. However, quantum evolution can also conserve quantities, or charges, that fail to commute with each other. Noncommuting charges have recently emerged as a subfield at the intersection of quantum thermodynamics and quantum information. I will give a brief introduction to the field of quantum noncommuting thermodynamics, as well as present our original results. Until recently, this subfield has remained theoretical. We initiate the experimental testing of its predictions, with a trapped-ion simulator. We find that small subsystems equilibrate to near a recently predicted non-Abelian thermal state. This work bridges quantum many-body simulators to the quantum thermodynamics of noncommuting charges, the predictions of which can now be tested

mathematical physicsgeneral physicsquantum physics

Audience: researchers in the topic

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QM Foundations & Nature of Time seminar

Series comments: Description: Physics foundations discussion seminar

Current access link in th.if.uj.edu.pl/~dudaj/QMFNoT

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