Quantum and Thermal Transitions Out of the Pair-Supersolid Phase of Two-Species Bosons in Lattice

Abstract

We investigate two-species bosons in a two-dimensional square lattice by quantum Monte Carlo method. We show that the inter-species attraction and nearest-neighbor intra-species repulsion results in the pair-supersolid phase, where a diagonal solid order coexists with an off-diagonal pair-superfluid order. The quantum and thermal transitions out of the pair-supersolid phase are characterized. It is found that there is a direct first order transition from the pair-supersolid phase to the double-superfluid phase without an intermediate region. Furthermore, the melting of the pair-supersolid occurs in two steps. Upon heating, first the pair-superfluid is destroyed via a KT transition then the solid order melts via an Ising transition

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Cited by in corpus (10)

• Demixing Effects in Mixtures of Two Bosonic Species
• Progress towards quantum simulating the classical O(2) model
• Pair supersolid of the extended Bose-Hubbard model with atom-pair hopping on the triangular Lattice
• Anisotropic pair-superfluidity of trapped two-component Bose gases
• Trimer superfluid and supersolid on two-dimensional optical lattices
• Worm quantum Monte-Carlo study of phase diagram of extended Jaynes-Cummings-Hubbard model
• Quantum phases of hardcore bosons in two coupled chains: A density matrix renormalization group study
• Quantum phase transitions and the degree of nonidentity in the system with two different species of vector bosons
• Magnetic polarons in two-component hard core bosons
• Quantitative Studies on the Quantum Critical Regime near Superfluid to Mott Insulator Transition