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Simultaneous Diagonal and Off Diagonal Order in the Bose--Hubbard Hamiltonian
R. T. Scalettar, G. G. Batrouni, A. P. Kampf +1
The Bose-Hubbard model exhibits a rich phase diagram consisting both of insulating regimes where diagonal long range (solid) order dominates as well as conducting regimes where off…
Competition Between Antiferromagnetic Order and Spin-Liquid Behavior in the Two-Dimensional Periodic Anderson Model at Half-Filling
M. Vekic, J. W. Cannon, D. J. Scalapino +2
We study the two-dimensional periodic Anderson model at half-filling using quantum Monte Carlo (QMC) techniques. The ground state undergoes a magnetic order-disorder transition as…
Competition between point and columnar disorder on the behavior of flux lines in 1+1 dimension
T. P. Devereaux, R. T. Scalettar, G. T. Zimanyi
The behavior of flux lines in the presence of both columnar and point disorder in 1+1 dimension is investigated using Renormalization Group and world-line Quantum Monte Carlo techn…