48
Conferences 2018
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[["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]]
6f153cadb11783a9e9633aa6ce792772
6
KEK Theory workshop 2018
<p>In the series of the KEK-TH workshops, this year we plan to have special days focusing on string phenomenology/cosmology. The workshop will also have regular sessions with broad coverage on field theory and string theory.</p>
<p>The list of invited speakers includes currently:</p>
<p>Sinya Aoki (YITP, Kyoto U.)<br />
Nobuyuki Ishibashi (U. Tsukuba)<br />
Hikaru Kawai (Kyoto U.)<br />
Noriaki Kitazawa (Tokyo Metropolitan U.)<br />
Yoshio Kikukawa (U. Tokyo)<br />
Tatsuo Kobayashi (Hokkaido U.)<br />
Taichiro Kugo (Kyoto Sangyo U.)<br />
Hajime Otsuka (Waseda U.)<br />
Sakura Schafer-Nameki (U. Oxford)<br />
Sang-Jin Sin (Hanyang U.)<br />
Shigeki Sugimoto (YITP, Kyoto U.)<br />
Tadashi Takayanagi (YITP, Kyoto U.)<br />
Kentaroh Yoshida (Kyoto U.)<br />
</p>
<p>We are looking forward to your participation.<br />
<br />
Organizers: Y. Asano, K. Hamada, M. Hatsuda, S. Iso, Y. Ito, K. Kawana, Y. Kimura, Y. Kitazawa, S. Mizoguchi, M. Natsuume, J. Nishimura, N. Shiba, S. Shiba, T. Suyama, S. Tsutsui Secretary: Yuko Ohno (Ms.) Email: yukoohno[AT]post.kek.jp</p>
<h2><span style="color:#B22222">Group Photo</span></h2>
<p><a href="https://conference-indico.kek.jp/indico/event/48/picture/2.jpg">https://conference-indico.kek.jp/indico/event/48/picture/2.jpg</a></p>
True
Kenkyu-Honkan bldg. 1F
Kobayashi Hall
2018-12-17T08:30:00
2018-12-20T15:50:00
2018-05-21T13:14:43
2018-12-26T05:11:51
Japan
30
false
[["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]]
1
On the emergence of (3+1)-dimensional expanding space-time in the Lorentzian type IIB matrix model (I)
Mr.
SOKENDAI
d41d8cd98f00b204e9800998ecf8427e
Kenkyu-Honkan bldg. 1F
Kobayashi Hall
2018-12-19T15:00:00
2018-12-19T18:00:00
03:00
The type IIB matrix model was proposed as a non-perturbative formulation of superstring theory in 1997. The emergence of (3+1)-dimensional space-time was observed in Monte Carlo studies of its Lorentzian version. This implies that an expanding (3+1)-dimensional space-time naturally appears from (9+1)-dimensional space-time, in which superstring theory is defined. The expanding behavior was studied by simulating simplified versions of the model, which suggested that the expansion is exponential at the beginning, and it turns into a power law at later times. This property is reminiscent of the inflation and the FRW universe, respectively. In this work we investigate the space-time structure of the matrix configurations obtained in the simulation, and find that the expanding 3d space is described essentially by the Pauli
matrices. We attribute this problem to an approximation, which is used
to avoid the sign problem in Monte Carlo simulation, and discuss the
possibility of obtaining a regular space-time if we investigate the
original model without such an approximation.