Work

Commensurate Two-Component Bosons in an Optical Lattice: Ground State Phase Diagram

Year: 2004

Type: article

Abstract: Two sorts of bosons in an optical lattice at commensurate filling factors can form five stable super-fluid and insulating ground states with rich and nontrivial phase diagram. The structure of the ground state diagram is established by mapping a d-dimensional quantum system onto a (d+1)-dimensional classical loop-current model and Monte Carlo (MC) simulations of the latter. Surprisingly, the quantum phase diagram features, besides second-order lines, first-order transitions and two multicritical points. We explain why first-order transitions are generic for models with pairing interactions using microscopic and mean-field (MF) arguments. In some cases, the MC results strongly deviate from the MF predictions.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.92.050402

Authors: Anatoly Kuklov, Nikolay Prokof’ev, Boris Svistunov

Institutions: College of Staten Island, City University of New York, University of Massachusetts Amherst, Kurchatov Institute

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, City University of New York, Nederlandse Organisatie voor Wetenschappelijk Onderzoek

OpenAlex ID: W2013003024

FWCI: 6.196

Cites: 20

Cited by: 193

Related to: 10