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dc.contributor.author
Anders, Peter
dc.contributor.author
Gull, Emanuel
dc.contributor.author
Pollet, Lode
dc.contributor.author
Troyer, Matthias
dc.contributor.author
Werner, Philipp
dc.date.accessioned
2018-12-19T12:22:02Z
dc.date.available
2017-06-09T13:12:31Z
dc.date.available
2018-12-19T12:22:02Z
dc.date.issued
2011-07
dc.identifier.issn
1367-2630
dc.identifier.other
10.1088/1367-2630/13/7/075013
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/38493
dc.identifier.doi
10.3929/ethz-b-000038493
dc.description.abstract
We discuss the recently developed bosonic dynamical mean-field theory (B-DMFT) framework, which maps a bosonic lattice model onto the self-consistent solution of a bosonic impurity model with coupling to a reservoir of normal and condensed bosons. The effective impurity action is derived in several ways: (i) as an approximation to the kinetic energy functional of the lattice problem, (ii) using a cavity approach and (iii) using an effective medium approach based on adding a one-loop correction to the self-consistently defined condensate. To solve the impurity problem, we use a continuous-time Monte Carlo algorithm based on the sampling of a perturbation expansion in the hybridization functions and the condensate wave function. As applications of the formalism, we present finite-temperature B-DMFT phase diagrams for the bosonic Hubbard model on a three-dimensional (3D) cubic and a 2D square lattice, the condensate order parameter as a function of chemical potential, critical exponents for the condensate, the approach to the weakly interacting Bose gas regime for weak repulsions and the kinetic energy as a function of temperature.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
IOP Publishing
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.subject
Electronic-structure calculations
en_US
dc.subject
Quantum impurity models
en_US
dc.subject
Monte-carlo
en_US
dc.subject
Infinite dimensions
en_US
dc.subject
Anderson model
en_US
dc.subject
Mott transition
en_US
dc.subject
Fermions
en_US
dc.subject
Superconductivity
en_US
dc.subject
Systems
en_US
dc.subject
Lattice
en_US
dc.title
Dynamical mean-field theory for bosons
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2011-07-29
ethz.journal.title
New Journal of Physics
ethz.journal.volume
13
en_US
ethz.journal.abbreviated
New J. Phys.
ethz.pages.start
075013
en_US
ethz.size
44 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
001997538
ethz.publication.place
London
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02511 - Institut für Theoretische Physik / Institute for Theoretical Physics::03622 - Troyer, Matthias (ehemalig) / Troyer, Matthias (former)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02511 - Institut für Theoretische Physik / Institute for Theoretical Physics::03622 - Troyer, Matthias (ehemalig) / Troyer, Matthias (former)
ethz.date.deposited
2017-06-09T13:13:05Z
ethz.source
ECIT
ethz.identifier.importid
imp59364e4f1139984832
ethz.ecitpid
pub:62142
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-12T13:38:54Z
ethz.rosetta.lastUpdated
2024-02-02T06:51:01Z
ethz.rosetta.versionExported
true
ethz.COinS
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