Scaling in the Fan of an Unconventional Quantum Critical Point
Scaling in the Fan of an Unconventional Quantum Critical Point
We present results of extensive finite-temperature quantum Monte Carlo simulations on a SU(2) symmetric $S=1/2$ quantum antiferromagnet with four-spin interaction [A. W. Sandvik, Phys. Rev. Lett. 98, 227202 (2007)]. Our simulations, which are free of the sign problem and carried out on lattices containing in excess of $1.6\ifmmode\times\else\texttimes\fi{}{10}^{4}$ spins, indicate …