Article (Scientific journals)
Nonequilibrium effects on charge and energy partitioning after an interaction quench
Calzona, Alessio; Gambetta, Filippo Maria; Carrega, Matteo et al.
2017In Physical Review. B, 95, p. 085101
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Keywords :
1D interacting systems; luttigner liquid; quantum quench; fractionalization; steady state; energy; partitioning; electron-electron interaction; integrable system
Abstract :
[en] Charge and energy fractionalization are among the most intriguing features of interacting one-dimensional fermion systems. In this work we determine how these phenomena are modified in the presence of an interaction quench. Charge and energy are injected into the system suddenly after the quench, by means of tunneling processes with a noninteracting one-dimensional probe. Here, we demonstrate that the system settles to a steady state in which the charge fractionalization ratio is unaffected by the prequenched parameters. On the contrary, due to the postquench nonequilibrium spectral function, the energy partitioning ratio is strongly modified, reaching values larger than 1. This is a peculiar feature of the nonequilibrium dynamics of the quench process and it is in sharp contrast with the nonquenched case, where the ratio is bounded by 1.
Disciplines :
Physics
Author, co-author :
Calzona, Alessio ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit ; University of Genova ; SPIN-CNR Genova
Gambetta, Filippo Maria;  University of Genova ; SPIN-CNR Genova
Carrega, Matteo;  NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa
Cavaliere, Fabio;  University of Genova ; SPIN-CNR Genova
Sassetti, Maura;  University of Genova ; SPIN-CNR Genova
External co-authors :
yes
Language :
English
Title :
Nonequilibrium effects on charge and energy partitioning after an interaction quench
Publication date :
01 February 2017
Journal title :
Physical Review. B
ISSN :
2469-9969
Publisher :
American Physical Society
Volume :
95
Pages :
085101
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Funders :
MIUR-FIRB2013 – Project Coca (Grant No. RBFR1379UX)
COST Action MP1209
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