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  • 1.
    Smakov, Jurij
    et al.
    KTH, Superseded Departments, Physics.
    Batista, C D
    Ortiz, G
    Stripes, topological order, and deconfinement in a planar t-J(z) model2004In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 93, no 6, p. 067201-Article in journal (Refereed)
    Abstract [en]

    We determine the quantum phase diagram of a two-dimensional bosonic t-J(z) model as a function of the lattice anisotropy gamma, using a quantum Monte Carlo loop algorithm. We show analytically that the low-energy sectors of the bosonic and the fermionic t-J(z) models become equivalent in the limit of small gamma. In this limit, the ground state represents a static stripe phase characterized by a nonzero value of a topological order parameter. This phase remains up to intermediate values of gamma, where there is a quantum phase transition to a phase-segregated state or a homogeneous superfluid with dynamic stripe fluctuations depending on the ratio J(z)/t.

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