Advanced

Initial correlated states for the generalized Kadanoff–Baym Ansatz without adiabatic switching-on of interactions in closed systems

Hopjan, Miroslav LU and Verdozzi, Claudio LU (2019) In European Physical Journal: Special Topics 227(15-16). p.1939-1948
Abstract

We reconsider the Generalized Kadanoff–Baym Ansatz (GKBA) approximation for non-equilibrium Green’s functions and extend it to self-consistently define an equilibrium correlated (within GKBA) state in closed systems. The advantage of the proposed prescription is to avoid the preparation of the initial equilibrium correlated state via adiabatic switching-on of the correlations. A simple model system, namely a Hubbard-dimer, is used to illustrate aspects of the computational implementation and performance of the new scheme.

Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal: Special Topics
volume
227
issue
15-16
pages
1939 - 1948
publisher
EDP Sciences
external identifiers
  • scopus:85060127961
ISSN
1951-6355
DOI
10.1140/epjst/e2018-800054-3
language
English
LU publication?
yes
id
0f67b182-2a47-4372-8d71-8573d80f39e8
date added to LUP
2019-01-30 09:35:40
date last changed
2019-09-17 04:47:55
@article{0f67b182-2a47-4372-8d71-8573d80f39e8,
  abstract     = {<p>We reconsider the Generalized Kadanoff–Baym Ansatz (GKBA) approximation for non-equilibrium Green’s functions and extend it to self-consistently define an equilibrium correlated (within GKBA) state in closed systems. The advantage of the proposed prescription is to avoid the preparation of the initial equilibrium correlated state via adiabatic switching-on of the correlations. A simple model system, namely a Hubbard-dimer, is used to illustrate aspects of the computational implementation and performance of the new scheme.</p>},
  author       = {Hopjan, Miroslav and Verdozzi, Claudio},
  issn         = {1951-6355},
  language     = {eng},
  month        = {01},
  number       = {15-16},
  pages        = {1939--1948},
  publisher    = {EDP Sciences},
  series       = {European Physical Journal: Special Topics},
  title        = {Initial correlated states for the generalized Kadanoff–Baym Ansatz without adiabatic switching-on of interactions in closed systems},
  url          = {http://dx.doi.org/10.1140/epjst/e2018-800054-3},
  volume       = {227},
  year         = {2019},
}