Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Namekawa, Yusuke"'
Publikováno v:
Phys. Rev. D 108, 094504 (2023)
The path optimization method, which is proposed to control the sign problem in quantum field theories with continuous degrees of freedom by machine learning, is applied to a spin model with discrete degrees of freedom. The path optimization method is
Externí odkaz:
http://arxiv.org/abs/2309.06018
Publikováno v:
PoS LATTICE2022 (2023) 284
Bridge++ is a general-purpose code set for lattice QCD simulations aiming at a readable, extensible, and portable code while keeping practical high performance. The new version 2.0 employs machine-dependent optimization, enabling flexible data layout
Externí odkaz:
http://arxiv.org/abs/2303.05883
Autor:
Yokota, Takeru, Ito, Yuta, Matsufuru, Hideo, Namekawa, Yusuke, Nishimura, Jun, Tsuchiya, Asato, Tsutsui, Shoichiro
We investigate color superconductivity on the lattice using the gap equation for the Cooper pair condensate. The weak coupling analysis is justified by choosing the physical size of the lattice to be smaller than the QCD scale, while keeping the aspe
Externí odkaz:
http://arxiv.org/abs/2302.11273
Autor:
Yamazaki, Takeshi, Ishikawa, Ken-ichi, Ishizuka, Naruhito, Kuramashi, Yoshinobu, Namekawa, Yusuke, Taniguchi, Yusuke, Ukita, Naoya, Collaboration, Tomoteru Yoshié for PACS
We calculate the kaon semileptonic form factors using the two sets of the PACS10 configuration, whose physical volumes are more than (10 fm)$^4$ at the physical point. The lattice spacings are 0.063 and 0.085 fm. The configurations were generated usi
Externí odkaz:
http://arxiv.org/abs/2212.00255
We investigate efficiency of a gauge-covariant neural network and an approximation of the Jacobian in optimizing the complexified integration path toward evading the sign problem in lattice field theories. For the construction of the complexified int
Externí odkaz:
http://arxiv.org/abs/2210.05402
Autor:
Ishikawa, Ken-ichi, Ishizuka, Naruhito, Kuramashi, Yoshinobu, Namekawa, Yusuke, Taniguchi, Yusuke, Ukita, Naoya, Yamazaki, Takeshi, Collaboration, Tomoteru Yoshié for PACS
Publikováno v:
Phys.Rev.D 106 (2022) 9, 094501
We present updated results for the form factors of the kaon semileptonic $(K_{\ell 3})$ decay process calculated with $N_f = 2 + 1$ nonperturbatively $O(a)$-improved Wilson quark action and Iwasaki gauge action at the physical point on large volumes
Externí odkaz:
http://arxiv.org/abs/2206.08654
The numerical sign problem is a major obstacle to the quantitative understanding of many important physical systems with first-principles calculations. Typical examples for such systems include finite-density QCD, strongly-correlated electron systems
Externí odkaz:
http://arxiv.org/abs/2205.00652
Autor:
Namekawa, Yusuke, Asano, Yuhma, Ito, Yuta, Kaneko, Takashi, Matsufuru, Hideo, Nishimura, Jun, Tsuchiya, Asato, Tsutsui, Shoichiro, Yokota, Takeru
We discuss the flavor number dependence of QCD at low temperature and high density by the complex Langevin method. In our previous work, the complex Langevin method is confirmed to satisfy the criterion for correct convergence in certain regions, suc
Externí odkaz:
http://arxiv.org/abs/2112.00150
The worldvolume tempered Lefschetz thimble method (WV-TLTM) is an algorithm towards solving the sign problem, where hybrid Monte Carlo updates are performed on a continuous accumulation of flowed surfaces foliated by the anti-holomorphic gradient flo
Externí odkaz:
http://arxiv.org/abs/2111.14669
Autor:
Yokota, Takeru, Asano, Yuhma, Ito, Yuta, Matsufuru, Hideo, Namekawa, Yusuke, Nishimura, Jun, Tsuchiya, Asato, Tsutsui, Shoichiro
We develop a new method to investigate color superconductivity (CSC) on the lattice based on the Thouless criterion, which amounts to solving the linearized gap equation without imposing any ansatz on the structure of the Cooper pairs. We perform exp
Externí odkaz:
http://arxiv.org/abs/2111.14578