Vanishing of the negative-sign problem of quantum Monte Carlo simulations in one-dimensional frustrated spin systems
Tota Nakamura
Abstract
The negative-sign problem in one-dimensional frustrated quantum spin systems is solved. We can remove negative signs of the local Boltzmann weights by using a dimer basis that has the spin-reversal symmetry. Validity of this new basis is checked in a general frustrated double-spin-chain system, namely the J0-J1-J2-J3 model. The negative sign vanishes perfectly for J0 + J1 ≤ J3.
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