Multicriticality and interaction-induced first-order phase transitions in mixtures of ultracold bosons in an optical lattice

被引:6
作者
Anufriiev, S. [1 ]
Zaleski, T. A. [1 ]
机构
[1] PAS, Inst Low Temp & Struct Res, Ul Okolna 2, PL-50422 Wroclaw, Poland
关键词
SUPERFLUID; ATOMS; TEMPERATURE; INSULATOR; GASES; MODEL;
D O I
10.1103/PhysRevA.94.043613
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We study a critical behavior of mixtures of two species of ultracold bosons trapped in an optical lattice. Using mean-field approximation, we determine the ground-state phase diagram of the system for a wide range of parameters. The introduction of interactions between different species of atoms strongly renormalizes the phase diagram. It can alter the critical behavior modifying multicriticality of crossing points and order of phase transitions in their vicinity between mixed and superfluid states. For selected values of model parameters, the behavior of the system falls out of the XY model universality class, which usually is a hallmark of superfluid phase transition. We supplement our analysis with analytical calculations to explain the observed scenario.
引用
收藏
页数:7
相关论文
共 24 条
[11]   Mott-insulator-to-superfluid transition in Bose-Bose mixtures in a two-dimensional lattice [J].
Guglielmino, M. ;
Penna, V. ;
Capogrosso-Sansone, B. .
PHYSICAL REVIEW A, 2010, 82 (02)
[12]   Superfluid-insulator transitions of two-species bosons in an optical lattice [J].
Isacsson, A ;
Cha, MC ;
Sengupta, K ;
Girvin, SM .
PHYSICAL REVIEW B, 2005, 72 (18)
[13]   Cold bosonic atoms in optical lattices [J].
Jaksch, D ;
Bruder, C ;
Cirac, JI ;
Gardiner, CW ;
Zoller, P .
PHYSICAL REVIEW LETTERS, 1998, 81 (15) :3108-3111
[14]   Quantum Tricriticality at the Superfluid-Insulator Transition of Binary Bose Mixtures [J].
Kato, Yasuyuki ;
Yamamoto, Daisuke ;
Danshita, Ippei .
PHYSICAL REVIEW LETTERS, 2014, 112 (05)
[15]   Temperature effects on superfluid phase transition in Bose-Hubbard model with three-body interaction [J].
Kopec, T. K. ;
Szymanski, M. W. .
PHYSICS LETTERS A, 2014, 378 (45) :3402-3405
[16]   EFFECT OF THE TEMPERATURE AND CONCENTRATION OF MAGNETIC ATOMS ON PHASE-DIAGRAMS AND ORDER PARAMETERS IN FERROMAGNETIC SUPERCONDUCTORS [J].
KOPEC, TK ;
KLAMUT, J .
PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1986, 137 (01) :73-79
[17]   Commensurate two-component bosons in an optical lattice: Ground state phase diagram [J].
Kuklov, A ;
Prokof'ev, N ;
Svistunov, B .
PHYSICAL REVIEW LETTERS, 2004, 92 (05) :4
[18]   Localization of bosonic atoms by fermionic impurities in a three-dimensional optical lattice [J].
Ospelkaus, S. ;
Ospelkaus, C. ;
Wille, O. ;
Succo, M. ;
Ernst, P. ;
Sengstock, K. ;
Bongs, K. .
PHYSICAL REVIEW LETTERS, 2006, 96 (18)
[19]   Multicritical behavior of two-dimensional anisotropic antiferromagnets in a magnetic field [J].
Pelissetto, Andrea ;
Vicari, Ettore .
PHYSICAL REVIEW B, 2007, 76 (02)
[20]  
Pynn R., 1984, MULTICRITICAL PHENOM