Quantum simulations of the superfluid-insulator transition for two-dimensional, disordered, hard-core bosons

Journal Article · Mon Feb 27 04:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.1500· OSTI ID:6405596

Zhang, S; Kawashima, N ^[1]; Carlson, J; Gubernatis, J E ^[2]

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1. Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We introduce two quantum Monte Carlo algorithms and employ them to study the superfluid-insulator transition in a two-dimensional system of hard-core bosons. One of the algorithms is appropriate for zero temperature and is based upon the Green's function Monte Carlo method; the other is an extension of the finite-temperature world-line cluster method. In each case we find that the dynamical exponent is consistent with the theoretical prediction of [ital z]=2 by Fisher and co-workers.

• OSTI ID: 6405596
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 74:9; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSONS
CALCULATION METHODS
FUNCTIONS
GREEN FUNCTION
HARD-CORE POTENTIAL
MATHEMATICAL MODELS
MONTE CARLO METHOD
NUCLEAR MODELS
NUCLEAR POTENTIAL
PHASE TRANSFORMATIONS
POTENTIALS
SIMULATION
SUPERFLUID MODEL
TEMPERATURE DEPENDENCE