Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102343
Title: Pseudospin S = 1 formalism and skyrmion-like excitations in the three-body constrained extended Bose–Hubbard model
Authors: Moskvin, A. S.
Issue Date: 2015
Publisher: Maik Nauka-Interperiodica Publishing
Citation: Moskvin A. S. Pseudospin S = 1 formalism and skyrmion-like excitations in the three-body constrained extended Bose–Hubbard model / A. S. Moskvin. — DOI 10.1134/S1063776115090095 // Journal of Experimental and Theoretical Physics. — 2015. — Vol. 121. — Iss. 3. — P. 477-490.
Abstract: We discuss the most prominent and intensively studied S = 1 pseudospin formalism for the extended bosonic Hubbard model (EBHM) with the on-site Hilbert space truncated to the three lowest occupation states n = 0, 1, 2. The EBHM Hamiltonian is a paradigmatic model for the highly topical field of ultracold gases in optical lattices. The generalized non-Heisenberg effective pseudospin Hamiltonian does provide a deep link with a boson system and a physically clear description of “the myriad of phases,” from uniform Mott insulating phases and density waves to two types of superfluids and supersolids. We argue that the 2D pseudospin system is prone to a topological phase separation and focus on several types of unconventional skyrmion-like topological structures in 2D boson systems, which have not been analyzed until now. The structures are characterized by a complicated interplay of insulating and two superfluid phases with a single- boson and two-boson condensation, respectively. © 2015, Pleiades Publishing, Inc.
Keywords: BOSONS
HUBBARD MODEL
OPTICAL LATTICES
PHASE SEPARATION
TOPOLOGY
BOSON SYSTEMS
BOSONIC HUBBARD MODELS
INSULATING PHASIS
PARADIGMATIC MODELS
PSEUDO-SPIN HAMILTONIAN
SUPERFLUID PHASIS
TOPOLOGICAL PHASE
TOPOLOGICAL STRUCTURE
HAMILTONIANS
URI: http://hdl.handle.net/10995/102343
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84944743759
PURE ID: 549570
46764842-4115-4819-bd1d-4e90a17e7141
ISSN: 10637761
DOI: 10.1134/S1063776115090095
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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