Exact Correlation Amplitude for the S=1/2 Heisenberg Antiferromagnetic Chain

Details Exact Correlation Amplitude for the S=1/2 Heisenberg Antiferromagnetic Chain Exact Correlation Amplitude for the S=1/2 Heisenberg Antiferromagnetic Chain

1998-02-04

arxiv.org/abs/cond-mat/9802045v2

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 3 figures, added reference and discussion

Scientific paper

10.1088/0305-4470/31/20/002

The exact amplitude for the asymptotic correlation function in the S=1/2
Heisenberg antiferromagnetic chain is determined: goes to (-1)^r
delta^{ab}(ln r)^{1/2}/[(2 pi)^{3/2}r]. The behaviour of the correlation
functions for small xxz anisotropy and the form of finite-size corrections to
the correlation function are also analysed.

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