- 著者
- Yamazaki Takeshi Ishikawa Ken-ichi Kuramashi Yoshinobu Ukawa Akira
- 出版者
- American Physical Society
- 雑誌
- Physical review D (ISSN:15507998)
- 巻号頁・発行日
- vol.86, no.7, pp.074514, 2012-10
- 被引用文献数
- 92
We calculate the binding energies for multinucleon bound states with the nuclear mass number less than or equal to 4 in 2+1 flavor QCD at the lattice spacing of a=0.09 fm employing a relatively heavy quark mass corresponding to mπ=0.51 GeV. To distinguish a bound state from attractive scattering states, we investigate the volume dependence of the energy shift between the ground state and the state of free nucleons by changing the spatial extent of the lattice from 2.9 to 5.8 fm. We conclude that 4He, 3He, deuteron and dineutron are bound at mπ=0.51 GeV. We compare their binding energies with those in our quenched studies and also with several previous investigations.
- 著者
- TADANO Hiroto SAKURAI Tetsuya KURAMASHI Yoshinobu
- 出版者
- 筑波大学大学院システム情報工学研究科コンピュータサイエンス専攻
- 雑誌
- Technical Report of Department of Computer Science
- 巻号頁・発行日
- pp.1-10, 2008
In this paper, the influence of errors which arise in matrix multiplications on theaccuracy of approximate solutions generated by the Block BiCGSTAB method is analyzed.In order to generate high accuracy solutions, a new Block Krylov subspacemethod is also proposed. Some numerical experiments illustrate that high accuracysolutions can be obtained by using the proposed method compared with the BlockBiCGSTAB method.