Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Seki, Kouichi"'
Publikováno v:
Phys. Rev. B 104, 134405 (2021)
We propose an entanglement-based algorithm of the tensor-network strong-disorder renormalization group (tSDRG) method for quantum spin systems with quenched randomness. In contrast to the previous tSDRG algorithm based on the energy spectrum of renor
Externí odkaz:
http://arxiv.org/abs/2107.01555
Publikováno v:
Phys. Rev. B 102, 144439 (2020)
Novel randomness-induced disordered ground states in two-dimensional (2D) quantum spin systems have been attracting much interest. For quantitative analysis of such random quantum spin systems, one of the most promising numerical approaches is the te
Externí odkaz:
http://arxiv.org/abs/2006.12857
Autor:
Okunishi, Kouichi, Seki, Kouichi
Publikováno v:
J. Phys. Soc. Jpn. 88, 114002 (2019)
For the XXZ chain, we discuss the relation between a lattice version of Unruh effect and the ground-state entanglement on the basis of the corner Hamiltonian. We find that the lattice Unruh temperature is interpreted as $\beta_\lambda = 2\pi/a$ with
Externí odkaz:
http://arxiv.org/abs/1906.10441
Autor:
Seki, Kouichi, Okunishi, Kouichi
Publikováno v:
J. Phys. Soc. Jpn. 87, 023001 (2018)
Using the event-chain Monte Carlo (MC) algorithm, we investigate phase transitions of the stacked Kagome Heisenberg systems with classical vector spins including up to the 3rd-nearest-neighbor couplings. In particular, we focus on two types of non-co
Externí odkaz:
http://arxiv.org/abs/1710.06174
Autor:
Seki, Kouichi, Okunishi, Kouichi
Publikováno v:
J. Phys. Soc. Jpn. 88, 024003 (2019)
We introduce a snapshot density matrix and snapshot spectrum for world-line (WL) quantum Monte Carlo simulations, by integrating out the continuous-imaginary-time index of WL snapshots. For the transverse-field Ising chain, we reveal fundamental prop
Externí odkaz:
http://arxiv.org/abs/1706.09257
Publikováno v:
J. Phys. Soc. Jpn. 86, 114701 (2017)
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 twelve-sublattice structure accompanying spontaneous breaking of the translational symmetry --
Externí odkaz:
http://arxiv.org/abs/1706.02879
Autor:
Seki, Kouichi, Okunishi, Kouichi
Publikováno v:
Phys. Rev. B 91, 224403 (2015)
Using Monte Carlo simulations, we explore the magnetic phase diagram of the triangular spin tubes coupled with a ferromagnetic inter-tube interaction for CsCrF4. A planar structure of the coupled tubes is topologically equivalent to the Kagome-triang
Externí odkaz:
http://arxiv.org/abs/1502.06702
Akademický článek
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Autor:
Fukuzaki, Takaaki, Kawata, Sumio *, Imai, Yasuharu, Tamura, Shinji, Inada, Masami, Maeda, Hisanori, Shirai, Yasuhiro, Maeda, Yuichi, Yabuuchi, Iwao, Kiriyama, Kazuo, Himeno, Seiichi, Toyoshima, Hiroyuki, Nishikawa, Masahiro, Kashihara, Takeshi, Minami, Yuzo, Nishiuchi, Meiko, Seki, Kouichi, Matsuzawa, Yuji
Publikováno v:
In Hepatology Research 2000 17(2):156-166
