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Prog. Theor. Phys. Supplement No.145 (2002) pp. 204-207

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Matrix Product State Approximation for the Maximum-Eigenvalue Eigenstate of the Quantum Transfer Matrix

Nobuya Maeshima,1,* Yasuhiro Hieida,2 Tomotoshi Nishino3 and Kouichi Okunishi4

1Department of Physics, Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan
2Computer and Network Center, Saga University, Saga 840-8502, Japan
3Department of Physics, Graduate School of Science, Kobe University, Kobe 657-8501, Japan
4Department of Physics, Niigata University, Niigata 950-2181, Japan

(Received December 20, 2001)

Abstract:

We propose a matrix product state (MPS) formulation to calculate thermodynamic quantities of one dimensional (1D) quantum systems. The maximum-eigenvalue eigenstate of the quantum transfer matrix is represented as the product of local matrices, which are obtained by the DMRG method for the two dimensional (2D) classical system mapped from the original 1D quantum system. This MPS formulation is successfully applied to the S=1/2 XY model.


URL : http://ptp.ipap.jp/link?PTPS/145/204/
DOI : 10.1143/PTPS.145.204


*E-mail: maeshima@acty.phys.sci.osaka-u.ac.jp

[ Full Text PDF : FREE ACCESS (108K) ] Citation:


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