Correlation Function of the Spin - 1 / 2 XXX
نویسنده
چکیده
We consider a special correlation function in the isotropic spin-1 2 Heisenberg antiferromagnet. It is the probability of nding a ferromagnetic string of (adjacent) spins in the antiferromagnetic ground state. We give two diierent representations for this correlation function. Both of them are exact at any distance, but one becomes more eeective for the description of long distance behaviour, the other for the description of short distance behaviour.
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