Nested cluster algorithm for frustrated quantum antiferromagnets.
Frustrated antiferromagnets are important materials whose quantum Monte Carlo simulation suffers from a severe sign problem. We construct a nested cluster algorithm which uses a powerful strategy to address this problem. For the spin 1/2 Heisenberg antiferromagnet on a kagome and on a frustrated square lattice the sign problem is eliminated for large systems. The method is applicable to general lattice geometries but limited to moderate temperatures.
Nyfeler
M
M
Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, 3012 Bern, Switzerland.
Jiang
F-J
FJ
Kämpfer
F
F
Wiese
U-J
UJ