Physics – Condensed Matter
Scientific paper
1993-10-25
J.Phys. A27 (1994) 1121-1126
Physics
Condensed Matter
6 pages, LaTeX, BONN-HE-93-40
Scientific paper
10.1088/0305-4470/27/4/008
We consider the anisotropic $XY$ chain in a magnetic field with special
boundary conditions described by a two-parameter Hamiltonian. It is shown that
the exchange of the parameters corresponds to a similarity transformation,
which reduces in a special limit to the Ising duality transformation.
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