---
_id: '455'
abstract:
- lang: eng
text: The derivation of effective evolution equations is central to the study of
non-stationary quantum many-body systems, and widely used in contexts such as
superconductivity, nuclear physics, Bose–Einstein condensation and quantum chemistry.
We reformulate the Dirac–Frenkel approximation principle in terms of reduced density
matrices and apply it to fermionic and bosonic many-body systems. We obtain the
Bogoliubov–de Gennes and Hartree–Fock–Bogoliubov equations, respectively. While
we do not prove quantitative error estimates, our formulation does show that the
approximation is optimal within the class of quasifree states. Furthermore, we
prove well-posedness of the Bogoliubov–de Gennes equations in energy space and
discuss conserved quantities
acknowledgement: Open access funding provided by Institute of Science and Technology
(IST Austria). The authors acknowledge support by ERC Advanced Grant 321029 and
by VILLUM FONDEN via the QMATH Centre of Excellence (Grant No. 10059). The authors
would like to thank Sébastien Breteaux, Enno Lenzmann, Mathieu Lewin and Jochen
Schmid for comments and discussions about well-posedness of the Bogoliubov–de Gennes
equations.
alternative_title:
- Annales Henri Poincare
article_processing_charge: No
author:
- first_name: Niels P
full_name: Benedikter, Niels P
id: 3DE6C32A-F248-11E8-B48F-1D18A9856A87
last_name: Benedikter
orcid: 0000-0002-1071-6091
- first_name: Jérémy
full_name: Sok, Jérémy
last_name: Sok
- first_name: Jan
full_name: Solovej, Jan
last_name: Solovej
citation:
ama: Benedikter NP, Sok J, Solovej J. The Dirac–Frenkel principle for reduced density
matrices and the Bogoliubov–de Gennes equations. Annales Henri Poincare.
2018;19(4):1167-1214. doi:10.1007/s00023-018-0644-z
apa: Benedikter, N. P., Sok, J., & Solovej, J. (2018). The Dirac–Frenkel principle
for reduced density matrices and the Bogoliubov–de Gennes equations. Annales
Henri Poincare. Birkhäuser. https://doi.org/10.1007/s00023-018-0644-z
chicago: Benedikter, Niels P, Jérémy Sok, and Jan Solovej. “The Dirac–Frenkel Principle
for Reduced Density Matrices and the Bogoliubov–de Gennes Equations.” Annales
Henri Poincare. Birkhäuser, 2018. https://doi.org/10.1007/s00023-018-0644-z.
ieee: N. P. Benedikter, J. Sok, and J. Solovej, “The Dirac–Frenkel principle for
reduced density matrices and the Bogoliubov–de Gennes equations,” Annales Henri
Poincare, vol. 19, no. 4. Birkhäuser, pp. 1167–1214, 2018.
ista: Benedikter NP, Sok J, Solovej J. 2018. The Dirac–Frenkel principle for reduced
density matrices and the Bogoliubov–de Gennes equations. Annales Henri Poincare.
19(4), 1167–1214.
mla: Benedikter, Niels P., et al. “The Dirac–Frenkel Principle for Reduced Density
Matrices and the Bogoliubov–de Gennes Equations.” Annales Henri Poincare,
vol. 19, no. 4, Birkhäuser, 2018, pp. 1167–214, doi:10.1007/s00023-018-0644-z.
short: N.P. Benedikter, J. Sok, J. Solovej, Annales Henri Poincare 19 (2018) 1167–1214.
date_created: 2018-12-11T11:46:34Z
date_published: 2018-04-01T00:00:00Z
date_updated: 2023-09-19T10:07:41Z
day: '01'
ddc:
- '510'
- '539'
department:
- _id: RoSe
doi: 10.1007/s00023-018-0644-z
external_id:
isi:
- '000427578900006'
file:
- access_level: open_access
checksum: 883eeccba8384ad7fcaa28761d99a0fa
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:11:57Z
date_updated: 2020-07-14T12:46:31Z
file_id: '4914'
file_name: IST-2018-993-v1+1_2018_Benedikter_Dirac.pdf
file_size: 923252
relation: main_file
file_date_updated: 2020-07-14T12:46:31Z
has_accepted_license: '1'
intvolume: ' 19'
isi: 1
issue: '4'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
page: 1167 - 1214
publication: Annales Henri Poincare
publication_status: published
publisher: Birkhäuser
publist_id: '7367'
pubrep_id: '993'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The Dirac–Frenkel principle for reduced density matrices and the Bogoliubov–de
Gennes equations
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 19
year: '2018'
...