Phys. Rev. B 49, 3592–3595 (1994)Long-time dynamics of the infinite-temperature Heisenberg magnetReceived 6 July 1993; published in the issue dated 1 February 1994 Infinite-temperature long-time dynamics of Heisenberg model H^=-1/2tsumi,jJijS^i⋅S^j is investigated. It is shown that the quantum-spin pair correlator is equal to the correlator of a classically evaluated vector field averaged over the initial conditions with respect to the Gaussian measure. In the continuous-limit case, the scaling estimations allow one to find the one-point correlator that turns out to be C(r=0;t)∝const×t-6/7. All results are obtained by straightforward procedures without any assumptions of the phenomenological character. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.49.3592
DOI:
10.1103/PhysRevB.49.3592
PACS:
75.10.Jm, 02.30.Cj
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