Uniform Matrix Product State in the Thermodynamic Limit

Details Uniform Matrix Product State in the Thermodynamic Limit Uniform Matrix Product State in the Thermodynamic Limit

2010-11-02

arxiv.org/abs/1011.0576v1

J. Phys. Soc. Jpn. 80 (2011) 023001

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1143/JPSJ.80.023001

We study a uniform matrix product state as a variational state for classical and quantum spin chains in the thermodynamic limit. Under a careful treatment of the translational symmetry, eigen values of the transfer matrix defined in the calculation of expectation values can reflect the periodicity of the ground state and indicate optimum periodicity of the matrix product state. We discuss the relation between the periodicity and accuracy of magnetization curves. This approach is free from the error due to finite system size, which works well especially for the magnetic plateau problem.

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