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Twist Boundary Conditions of Quantum Spin Chains near the Gaussian Fixed Points

A. Kitazawa
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Abstract

Duality transformation, which relates a high-temperature phase to a low-temperature one, is used exactly to determine the critical point for several models (2D Ising, Potts, Ashkin-Teller, 8-vertex), as the self dual condition. By changing boundary condition, numerically we can determine the self-dual(critical) point of the Ashkin-Teller(or Gaussian) model. This is the first explicit application of the duality to the numerical calculation, with the use of boundary conditions.

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A. Kitazawa. 1996-07-23. Twist Boundary Conditions of Quantum Spin Chains near the Gaussian Fixed Points. https://doi.org/10.1088/0305-4470%2F30%2F9%2F005

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