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Showing 2025 · cond-mat.stat-mechShow all
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cond-mat.stat-mech2025
Tree-Graph Based Construction of Quantum Spin Models with Exact Ground State
Toshiya Hikihara
We propose a protocol to generate an antiferromagnetic S=1/2 Heisenberg model with the exact ground state based on a tree graph. The generated model has a correspondence with a tre…
cond-mat.stat-mech2025★ 2 cited
Improving accuracy of tree-tensor network approach by optimization of network structure
Toshiya Hikihara, Hiroshi Ueda, Kouichi Okunishi +2
Numerical methods based on tensor networks have been extensively explored in the research of quantum many-body systems in recent years. It has been recognized that the ability of t…