THE PHYSCIS GRADUATE PROGRAM invites everyone to the seminar:
Gauge invariant quantum thermodynamics: consequences for the first law
Prof. Dr. Lucas Chibebe Céleri
Instituto de Física – UFG
Universality of classical thermodynamics rests on the central limit theorem, due to which measurements of thermal fluctuations are unable to reveal detailed information regarding the microscopic structure of a macroscopic body. When small systems are considered and fluctuations become important, thermodynamic quantities can be understood in the context of classical stochastic mechanics. A fundamental assumption behind thermodynamics is therefore that of coarse-graining, which stems from a substantial lack of control over all degrees of freedom. However, when quantum systems are concerned, one claims a high level of control. As a consequence, information theory plays a major role in the identification of thermodynamic functions. Here, drawing from the concept of gauge symmetry, essential in all modern physical theories, a new, intermediate, route is put forward. Working within the realm of quantum thermodynamics, a physically motivated gauge transformation, which encodes a gentle variant of coarse-graining behind thermodynamics, is explicitly constructed . As a consequence, quantum work and heat are reinterpreted, as well as the role of quantum coherence.
Date: November 5, 2021 – (friday) – Time: 10:15 a.m.
link to access the youtube channel: https://youtu.be/ieeh_LtXBgI