Painleve transcendent describes quantum correlation function of the XXZ antiferromagnet away from the free-fermion point
We consider quantum correlation functions of the antiferromagnetic spin-1/2 Heisenberg XXZ spin chain in a magnetic field. We show that for a magnetic field close to the critical field hc (for the critical magnetic field the ground state is ferromagnetic) certain correlation functions can be express...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1996
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