Perturbational Method for the Numerical Evaluation of the Ground-State Energy of the Heisenberg Model
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概要
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A perturbational method is developed and applied to the numerical calculation forthe energy of the ground state E. of antiferromagnetic Heisenberg model of finite sizesystems. In this method the system is divided into two subsystems and each one istreated exactly, while the interactions between the subsystems are taken into accountby the second order perturbation. This process saves the memory space of computer,and moreover the relative error is very small and decreases as the size of system is in-creased. Actual calculations for the triangular lattice are performed up to the numberof spins N=36 and E. for the infinite lattice is estimated as -(1.0440.01).X'?./l,where Jl is the exchange integral.[perturbationaI method, diagonalization of Hamiltonian, computer, Heisenberg ]l model, triangular latticel
- 社団法人日本物理学会の論文
- 1987-11-15
著者
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OGUCHI Takehiko
Department of Physics, Tokyo University of Education
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NISHIMORI Hidetoshi
Department of Physics,Tokyo Institute of Technology
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Oguchi Takehiko
Department Of Physics Tokyo Institute Of Technology
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Oguchi Takehiko
Department Of Sciences And Mathematics Technological University Of Nagaoka
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KITATANI Hidetsugu
Department of Sciences and Mathematics,Technological University of Nagaoka
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Kitatani Hidetsugu
Department Of Electrical Engineering Nagaoka University Of Technology
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Kitatani Hidetsugu
Department Of Sciences And Mathematics Technological University Of Nagaoka
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Nishimori Hidetoshi
Department Of Physics Tokyo Institute Of Technology
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Nishimori Hidetoshi
Department Of Physics Facuilty Of Science Tokyo Institute Of Technology
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Oguchi Takehiko
Department Of Physics Tokyo Insitute Of Technology:the Technological University Of Nagaoka
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