Search Results - "OKUNISHI, Kouichi"

Developments in the Tensor Network — from Statistical Mechanics to Quantum Entanglement by Okunishi, Kouichi, Nishino, Tomotoshi, Ueda, Hiroshi

“…Tensor networks (TNs) have become one of the most essential building blocks for various fields of theoretical physics such as condensed matter theory,…”
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Sine-square deformation and Möbius quantization of 2D conformal field theory by Okunishi, Kouichi

“…Motivated by sine-square deformation (SSD) for quantum critical systems in 1+1 dimensions, we discuss a Möbius quantization approach to the 2D conformal field…”
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A new technique to incorporate multiple fermion flavors in tensor renormalization group method for lattice gauge theories by Yosprakob, Atis, Nishimura, Jun, Okunishi, Kouichi

“…A bstract We propose a new technique to incorporate multiple fermion flavors in the tensor renormalization group method for lattice gauge theories, where…”
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Lattice Unruh Effect and World-line Entanglement for the XXZ Chain by Okunishi, Kouichi, Seki, Kouichi

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On Calculation of Vector Spin Chirality for Zigzag Spin Chains by OKUNISHI, Kouichi

“…We calculate the vector spin chirality for S=1/2 zigzag spin chains having U(1) symmetry, using the density matrix renormalization group combined with unitary…”
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Snapshot Spectra in the World-Line Quantum Monte Carlo for One-Dimensional Quantum Spin Systems by Seki, Kouichi, Okunishi, Kouichi

“…We introduce a snapshot density matrix and snapshot spectrum for world-line (WL) quantum Monte Carlo simulations by integrating out the…”
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Entanglement bipartitioning and tree tensor networks by Okunishi, Kouichi, Ueda, Hiroshi, Nishino, Tomotoshi

“…Abstract We propose the entanglement bipartitioning approach to design an optimal network structure of the tree tensor network (TTN) for quantum many-body…”
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Phase Transitions for Cuboc Orders in Stacked Kagome Heisenberg Systems by Seki, Kouichi, Okunishi, Kouichi

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Spin-Wave Analysis for Kagome-Triangular Spin System and Coupled Spin Tubes: Low-Energy Excitation for the Cuboc Order by Ochiai, Masahiro, Seki, Kouichi, Okunishi, Kouichi

“…The coupled spin tube system, which is equivalent to a stacked Kagome-triangular spin system, exhibits the cuboc order -- a non-coplanar spin order with a…”
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Automatic structural optimization of tree tensor networks by Hikihara, Toshiya, Ueda, Hiroshi, Okunishi, Kouichi, Harada, Kenji, Nishino, Tomotoshi

“…The tree tensor network (TTN) provides an essential theoretical framework for the practical simulation of quantum many-body systems, where the network…”
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Scale-free property and edge state of Wilson’s numerical renormalization group by Okunishi, Kouichi, Nishino, Tomotoshi

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A low-energy effective model for the S=1/2 Kagome-triangular-strip Heisenberg model by Okunishi, Kouichi, Onozato, Yoshitaka, Seki, Kouichi

“…We study low-energy properties of the S=1/2 kagome-triangular-strip Heisenberg model. Using exact diagonalization, we calculate magnetization curves of the…”
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Corner transfer matrix renormalization group method by NISHINO, T, OKUNISHI, K

“…We propose a new fast numerical renormalization group method ---the corner transfer matrix renormalization group (CTMRG) method ---which is based on a unified…”
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Fine-Tuning of Magnetic Interactions in Organic Spin Ladders by Yamaguchi, Hironori, Miyagai, Hirotsugu, Shimokawa, Tokuro, Iwase, Kenji, Ono, Toshio, Kono, Yohei, Kase, Naoki, Araki, Koji, Kittaka, Shunichiro, Sakakibara, Toshiro, Kawakami, Takashi, Okunishi, Kouichi, Hosokoshi, Yuko

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Quantum phase transitions of the asymmetric three-leg spin tube by Sakai, Tôru, Sato, Masahiro, Okunishi, Kouichi, Otsuka, Yuichi, Okamoto, Kiyomi, Itoi, Chigak

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Wilson-like real-space renormalization group and low-energy effective spectrum of the XXZ chain in the critical regime by OKUNISHI, Kouichi

“…We present a novel real-space renormalization group (RG) for the one-dimensional XXZ model in the critical regime, reconsidering the role of the cutoff…”
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Corner transfer matrix algorithm for classical renormalization group by NISHINO, T, OKUNISHI, K

“…We report a real-space renormalization group (RSRG) algorithm, which is formulated through Baxter's corner transfer matrix (CTM), for two-dimensional (d = 2)…”
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Uniform Matrix Product State in the Thermodynamic Limit by Ueda, Hiroshi, Maruyama, Isao, Okunishi, Kouichi

“…We study a uniform matrix product state as a variational state for classical and quantum spin chains in the thermodynamic limit. Under careful treatment of the…”
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Real-space renormalization group approach for the corner hamiltonian by OKUNISHI, Kouichi

“…We present a real-space renormalization group approach for the corner Hamiltonian, which is relevant to the reduced density matrix in the density matrix…”
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Exchange interaction via crystal-field excited states and its importance in CsCoCl3 by SHIBA, Hiroyuki, UEDA, Yoshifumi, OKUNISHI, Kouichi, KIMURA, Shojiro, KINDO, Koichi

“…The low-energy effective Hamiltonian is derived for a typical quasi-one-dimensional Ising-like antiferromagnet CsCoCl3. In contrast to previous treatments, in…”
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