---
_id: '1572'
abstract:
- lang: eng
text: "We consider the quantum ferromagnetic Heisenberg model in three dimensions,
for all spins S ≥ 1/2. We rigorously prove the validity of the spin-wave approximation
for the excitation spectrum, at the level of the first non-trivial contribution
to the free energy at low temperatures. Our proof comes with explicit, constructive
upper and lower bounds on the error term. It uses in an essential way the bosonic
formulation of the model in terms of the Holstein-Primakoff representation. In
this language, the model describes interacting bosons with a hard-core on-site
repulsion and a nearest-neighbor attraction. This attractive interaction makes
the lower bound on the free energy particularly tricky: the key idea there is
to prove a differential inequality for the two-particle density, which is thereby
shown to be smaller than the probability density of a suitably weighted two-particle
random process on the lattice.\r\n"
author:
- first_name: Michele
full_name: Correggi, Michele
last_name: Correggi
- first_name: Alessandro
full_name: Giuliani, Alessandro
last_name: Giuliani
- first_name: Robert
full_name: Seiringer, Robert
id: 4AFD0470-F248-11E8-B48F-1D18A9856A87
last_name: Seiringer
orcid: 0000-0002-6781-0521
citation:
ama: Correggi M, Giuliani A, Seiringer R. Validity of the spin-wave approximation
for the free energy of the Heisenberg ferromagnet. *Communications in Mathematical
Physics*. 2015;339(1):279-307. doi:10.1007/s00220-015-2402-0
apa: Correggi, M., Giuliani, A., & Seiringer, R. (2015). Validity of the spin-wave
approximation for the free energy of the Heisenberg ferromagnet. *Communications
in Mathematical Physics*. Springer. https://doi.org/10.1007/s00220-015-2402-0
chicago: Correggi, Michele, Alessandro Giuliani, and Robert Seiringer. “Validity
of the Spin-Wave Approximation for the Free Energy of the Heisenberg Ferromagnet.”
*Communications in Mathematical Physics*. Springer, 2015. https://doi.org/10.1007/s00220-015-2402-0.
ieee: M. Correggi, A. Giuliani, and R. Seiringer, “Validity of the spin-wave approximation
for the free energy of the Heisenberg ferromagnet,” *Communications in Mathematical
Physics*, vol. 339, no. 1. Springer, pp. 279–307, 2015.
ista: Correggi M, Giuliani A, Seiringer R. 2015. Validity of the spin-wave approximation
for the free energy of the Heisenberg ferromagnet. Communications in Mathematical
Physics. 339(1), 279–307.
mla: Correggi, Michele, et al. “Validity of the Spin-Wave Approximation for the
Free Energy of the Heisenberg Ferromagnet.” *Communications in Mathematical
Physics*, vol. 339, no. 1, Springer, 2015, pp. 279–307, doi:10.1007/s00220-015-2402-0.
short: M. Correggi, A. Giuliani, R. Seiringer, Communications in Mathematical Physics
339 (2015) 279–307.
date_created: 2018-12-11T11:52:47Z
date_published: 2015-06-23T00:00:00Z
date_updated: 2021-01-12T06:51:41Z
day: '23'
department:
- _id: RoSe
doi: 10.1007/s00220-015-2402-0
intvolume: ' 339'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1312.7873
month: '06'
oa: 1
oa_version: Preprint
page: 279 - 307
publication: Communications in Mathematical Physics
publication_status: published
publisher: Springer
publist_id: '5599'
quality_controlled: '1'
scopus_import: 1
status: public
title: Validity of the spin-wave approximation for the free energy of the Heisenberg
ferromagnet
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 339
year: '2015'
...