Pseudospin S=1 formalism and skyrmion-like excitations in the three-body constrained extended Bose-Hubbard model / Moskvin A. S. // JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS. - 2015. - V. 121, l. 3. - P. 477-490.

ISSN/EISSN:

1063-7761 / 1090-6509

Type:

Article

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.

Author keywords:

QUANTUM HEISENBERG-ANTIFERROMAGNET; 2-DIMENSIONAL FERROMAGNET; MAGNETIC SKYRMIONS; GROUND-STATES; CUO2 PLANES; SYSTEMS; LATTICE; PHASE; SPIN; DYNAMICS

DOI:

10.1134/S1063776115090095

Web of Science ID:

ISI:000363720900012

Соавторы в МНС:

—

Другие поля

Поле	Значение
Month	SEP
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6509
Keywords-Plus	QUANTUM HEISENBERG-ANTIFERROMAGNET; 2-DIMENSIONAL FERROMAGNET; MAGNETIC SKYRMIONS; GROUND-STATES; CUO2 PLANES; SYSTEMS; LATTICE; PHASE; SPIN; DYNAMICS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	alexander.moskvin@urfu.ru
Funding-Acknowledgement	Government of the Russian Federation {[}02.A03.21.0006]; Ministry of Education and Science of the Russian Federation {[}1437, 2725]
Funding-Text	We thank A.B. Borisov and Yu.D. Panov for the useful discussions. The research was supported by the Government of the Russian Federation, Program 02.A03.21.0006 and by the Ministry of Education and Science of the Russian Federation, projects nos. 1437 and 2725.
Number-of-Cited-References	53
Usage-Count-Since-2013	1
Journal-ISO	J. Exp. Theor. Phys.
Doc-Delivery-Number	CU7LS