Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102074
Title: The MFA ground states for the extended Bose-Hubbard model with a three-body constraint
Authors: Panov, Y. D.
Moskvin, A. S.
Vasinovich, E. V.
Konev, V. V.
Issue Date: 2018
Publisher: Elsevier B.V.
Citation: The MFA ground states for the extended Bose-Hubbard model with a three-body constraint / Y. D. Panov, A. S. Moskvin, E. V. Vasinovich, et al. — DOI 10.1016/j.physb.2017.09.037 // Physica B: Condensed Matter. — 2018. — Vol. 536. — P. 464-468.
Abstract: We address the intensively studied extended bosonic Hubbard model (EBHM) with truncation of the on-site Hilbert space to the three lowest occupation states n=0,1,2 in frames of the S=1 pseudospin formalism. Similar model was recently proposed to describe the charge degree of freedom in a model high-T c cuprate with the on-site Hilbert space reduced to the three effective valence centers, nominally Cu1+;2+;3+. With small corrections the model becomes equivalent to a strongly anisotropic S=1 quantum magnet in an external magnetic field. We have applied a generalized mean-field approach and quantum Monte-Carlo technique for the model 2D S=1 system with a two-particle transport to find the ground state phase with its evolution under deviation from half-filling. © 2017 Elsevier B.V.
Keywords: CUPRATES
MEAN-FIELD
PSEUDOSPIN FORMALISM
COPPER COMPOUNDS
DEGREES OF FREEDOM (MECHANICS)
GROUND STATE
HILBERT SPACES
HUBBARD MODEL
MONTE CARLO METHODS
QUANTUM CHEMISTRY
VECTOR SPACES
BOSE HUBBARD MODEL
BOSONIC HUBBARD MODELS
CUPRATES
EXTERNAL MAGNETIC FIELD
MEAN FIELD
MEAN FIELD APPROACH
PSEUDOSPIN
QUANTUM MONTE CARLO
QUANTUM THEORY
URI: http://hdl.handle.net/10995/102074
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85029615284
PURE ID: 7145351
be42b344-8fb9-4b5b-8959-f643fa06fdc3
ISSN: 9214526
DOI: 10.1016/j.physb.2017.09.037
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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