Universality in the equilibrium and out-of-equilibrium behavior close to quantum phase transitions

Lunedì 22 febbraio alle 17, Davide Rossini (Dipartimento di Fisica - Universita` di Pisa) tiene il seminario "Universality in the equilibrium and out-of-equilibrium behavior close to quantum phase transitions".

L'incontro fa parte del ciclo "Seminars on Quantum computing, technologies and applications", organizzato nell'ambito del Progetto di Ricerca di Ateneo su Quantum Computing & Technologies, coordinato da Massimo D'Elia.

Abstract

The recent experimental advances in the field of quantum simulation have enabled a wealth of amazing possibilities to study strongly correlated quantum systems. I will first give a brief overview of the open questions in the field and of the most promising platforms aimed at addressing such issues. I will then present a general dynamic scaling theory for the equilibrium and out-of-equilibrium behavior of quantum many-body systems in proximity of quantum transitions of any order. In particular, I will highlight a nontrivial competition that may arise between the coherent dynamics at quantum transitions and the dissipative perturbations, which can be formalized through the finite-size scaling framework.

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[Immagine: Sfera di Bloch, una rappresentazione di un qubit, di Glosser.ca - Opera propria, CC BY-SA 3.0]