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Dynamic scaling of the restoration of rotational symmetry in Heisenberg quantum antiferromagnets

2017
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Physical review B
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We apply imaginary-time evolution, ${\rm e}^{-\tau H}$, to study relaxation dynamics of gapless quantum antiferromagnets described by the spin-rotation invariant Heisenberg Hamiltonian ($H$). Using quantum Monte Carlo simulations, we propagate an initial state with maximal order parameter $m^z_s$ (the staggered magnetization) in the $z$ spin direction and monitor the expectation value $\langle m^z_s\rangle $ as a function of the time $\tau$. Different system sizes of lengths $L$ exhibit an

doi:10.1103/physrevb.96.054442
fatcat:p5dpw2jwqfekva6kwpaqid4h4a