Effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement

In thermal equilibrium, the fluctuation-dissipation theorem relates the linear response and correlation functions in a model and observable independent fashion. Out of equilibrium, these relations still hold if the equilibrium temperature is replaced by an observable and frequency-dependent paramete...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Bortolin, Tomás Sebastián, Iucci, Carlos Aníbal
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2015
Materias:	Física Quantum entanglement Physics Thermodynamic equilibrium Fluctuation-dissipation theorem Constant (mathematics) Canonical ensemble Thermal equilibrium Observable Quantum mechanics Quantum phase transition
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/126103
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-126103
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Física Quantum entanglement Physics Thermodynamic equilibrium Fluctuation-dissipation theorem Constant (mathematics) Canonical ensemble Thermal equilibrium Observable Quantum mechanics Quantum phase transition
spellingShingle	Física Quantum entanglement Physics Thermodynamic equilibrium Fluctuation-dissipation theorem Constant (mathematics) Canonical ensemble Thermal equilibrium Observable Quantum mechanics Quantum phase transition Bortolin, Tomás Sebastián Iucci, Carlos Aníbal Effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement
topic_facet	Física Quantum entanglement Physics Thermodynamic equilibrium Fluctuation-dissipation theorem Constant (mathematics) Canonical ensemble Thermal equilibrium Observable Quantum mechanics Quantum phase transition
description	In thermal equilibrium, the fluctuation-dissipation theorem relates the linear response and correlation functions in a model and observable independent fashion. Out of equilibrium, these relations still hold if the equilibrium temperature is replaced by an observable and frequency-dependent parameter (effective temperature). When the system achieves a long-time thermal state all of these effective temperatures should be equal and constant. Following this approach we examine the long-times regime after a quantum quench in a system with bipartite entanglement in which the asymptotic values of the observable are compatible with the ones obtained in a Gibbs ensemble. We observe that when the initial entanglement is large, and for a large range of (intermediate) frequencies, the effective temperatures corresponding to the analyzed local and nonlocal operators approach an approximate constant value equal to the temperature that governs the decay of correlations. Still, the residual frequency dependence in the effective temperature, and the differences observed among observables, discards strict thermalization.
format	Articulo Articulo
author	Bortolin, Tomás Sebastián Iucci, Carlos Aníbal
author_facet	Bortolin, Tomás Sebastián Iucci, Carlos Aníbal
author_sort	Bortolin, Tomás Sebastián
title	Effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement
title_short	Effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement
title_full	Effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement
title_fullStr	Effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement
title_full_unstemmed	Effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement
title_sort	effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement
publishDate	2015
url	http://sedici.unlp.edu.ar/handle/10915/126103
work_keys_str_mv	AT bortolintomassebastian effectivetemperaturefromfluctuationdissipationtheoreminsystemswithbipartiteeigenmodeentanglement AT iuccicarlosanibal effectivetemperaturefromfluctuationdissipationtheoreminsystemswithbipartiteeigenmodeentanglement
bdutipo_str	Repositorios
_version_	1764820450104311810

Effective temperature from fluctuation-dissipation theorem in systems with bipartite eigenmode entanglement

Ejemplares similares