Initial correlated states for the generalized Kadanoff–Baym Ansatz without adiabatic switching-on of interactions in closed systems
(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:
https://lup.lub.lu.se/record/0f67b182-2a47-4372-8d71-8573d80f39e8
- author
- Hopjan, Miroslav LU and Verdozzi, Claudio LU
- organization
- publishing date
- 2019-01-18
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal: Special Topics
- volume
- 227
- issue
- 15-16
- pages
- 1939 - 1948
- publisher
- Springer
- 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
- 2022-04-25 20:44:07
@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 = {{Springer}}, 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}}, doi = {{10.1140/epjst/e2018-800054-3}}, volume = {{227}}, year = {{2019}}, }