Easy Access to Energy Fluctuations in Nonequilibrium Quantum Many-Body Systems

We combine theoretical and experimental efforts to propose a method for studying energy fluctuations, in particular, to obtain the related bistochastic matrix of transition probabilities by means of simple measurements at the end of a protocol that drives a many-body quantum system out of equilibrium. This scheme is integrated with numerical optimizations in order to ensure a proper analysis of the experimental data, leading to physical probabilities. The method is experimentally evaluated employing a two interacting spin-1/2 system in a nuclear magnetic resonance setup. We show how to recover the transition probabilities using only local measures, which enables an experimental verification of the detailed fluctuation theorem in a many-body system driven out of equilibrium

• Autores: Peterson, John P.; Herrera Trujillo, Alba Marcela; Serra, Roberto M.; D’Amico, Irene
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2021
• Institución: Universidad Autónoma de Occidente
• Repositorio: RED: Repositorio Educativo Digital UAO
• Idioma: eng
• OAI Identifier: oai:red.uao.edu.co:10614/15868
• Acceso en línea: https://hdl.handle.net/10614/15868; https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.030602; https://red.uao.edu.co/
• Rights: closedAccess
• License: Derechos reservados - American Physical Society, 2021