Quantum Critical Point of the XY Model and Condensation of Field-Induced Quasiparticles in Dimer Compounds

Details Quantum Critical Point of the XY Model and Condensation of Field-Induced Quasiparticles in Dimer Compounds Quantum Critical Point of the XY Model and Condensation of Field-Induced Quasiparticles in Dimer Compounds

2004-08-30

arxiv.org/abs/cond-mat/0408649v2

J. Phys. Soc. Jpn. 73, 3219 (2004)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1143/JPSJ.73.3219

The quantum critical point of the three-dimensional XY model in a symmetry-preserving field is investigated. The results of Monte Carlo simulations with the directed-loop algorithm show that the quantum critical behavior is characterized by the mean-field values of critical exponents. The system-size dependence of various quantities is compared to a simple field-theoretical argument that supports the mean-field scaling.

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