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(Seminar) Emergent Dark Matter in Late Universe
02/06
2018
- Title (Seminar) Emergent Dark Matter in Late Universe
- Speaker
- Date
- Venue
Abstract
| CAS Key Laboratory of Theoretical Physics | |||
| Institute of Theoretical Physics | |||
| Chinese Academy of Sciences | |||
| Seminar | |||
| Title 题目 | Emergent Dark Matter in Late Universe | ||
| Speaker 报告人 | Sichun Sun | ||
| Affiliation 所在单位 | National Taiwan University | ||
| Date 日期 | 11:30am, Feb 06, 2018, Tuesday | ||
| Venue 地点 | ITP New Building 6420
| ||
| Abstract 摘要 | We discuss a scenario that the dark matter in late universe emerges as the holographic stress energy tensor on the hypersurface in higher dimensional flat bulk. Firstly we construct a toy model with a de Sitter hypersurface as the holographic screen in flat spacetime. Both of the dark matter and dark energy can be described by the Brown-York stress energy tensor. We find an interesting relation between the dark matter and baryonic matter density parameters, by using the Lambda cold dark matter parameterization. We further show how to embed this emergent dark matter into brane world scenario. We also comment on the connection with the Verlinde's emergent gravity. We show that from the holographic de Sitter model with elasticity, the Tully-Fisher relation of the dark matter distribution in the galaxy scale can be derived. | ||
| Contact person 所内联系人 | Zong-Kuan Guo | ||