Phase Diagram of Mixtures of Ultracold Bosons in Optical Lattice

• Authors: S. Anufriiev , T. Zaleski
• Languages of publication: EN

Abstracts

EN

We study a behaviour of mixture of two species of ultracold bosons trapped in optical lattice. Using mean-field approximation, we determine the phase diagram of the system for wide range of parameters. We observe that each of the groups of atoms can condense into superfluid state or localize and form the Mott insulator, which yields that the whole system is either superfluid, the Mott insulator, or a mixed state. It appears that introduction of interaction between different kinds of atoms can strongly renormalise the phase diagram. It can alter the critical behaviour modifying multi-criticality of crossing points and order of phase transitions between mixed and superfluid states.

Keywords

EN

03.75.Hh; 05.30.Jp; 67.85.Hj

Discipline

• 67.85.Hj: Bose-Einstein condensates in optical potentials
• 05.30.Jp: Boson systems(for static and dynamic properties of Bose-Einstein condensates, see 03.75.Hh and 03.75.Kk; see also 67.10.Ba Boson degeneracy in quantum fluids)
• 03.75.Hh: Static properties of condensates; thermodynamical, statistical, and structural properties

• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 2
• Pages: 629-632

Dates

published

2016-08

Contributors

author

S. Anufriiev

• Institute of Low Temperature and Structure Research, PAS, Okólna 2, 50-422 Wrocław, Poland

author

T. Zaleski

• Institute of Low Temperature and Structure Research, PAS, Okólna 2, 50-422 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.130.629