Advanced Computing Platform for Theoretical Physics

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| 11.25 | Gong Cheng 程功 | Shao-Jiang Wang 王少江 |
| 12.2 | Wen-Hong Ruan 阮文洪 | |
| 12.9 | Yong Zhou 周勇 | He Wang 王赫 |
| 12.16 | Yu-Shi Hao 郝宇诗 | Fu-Guo Yang 杨富国 |
| 12.23 | Zhi-Zhang Peng 彭治章 | Teng Ji 纪腾 |
| 12.30 | Cheng-Hu Ge 葛成虎 | Hao-Tian Sun 孙昊田 and Jia-Ning Wang 王嘉宁 |
| 1.6 | Next Round | Tan Cheng and Zi-Yan Yuwen 陈坦 和 宇文子炎 |
| 1.13 | ... | Zhen-Min Zeng and Yu-Ping An 曾振民 和 安裕平 |
| 12.16 | | Fu-Guo Yang 杨富国 |
| 12.23 | Yu-Shi Hao 郝宇诗 | Teng Ji 纪腾 |
| 12.30 | Zhi-Zhang Peng 彭治章 | Hao-Tian Sun 孙昊田 and Jia-Ning Wang 王嘉宁 |
| 1.6 | Cheng-Hu Ge 葛成虎 | Tan Cheng and Zi-Yan Yuwen 陈坦 和 宇文子炎 |
| 1.13 | | Zhen-Min Zeng and Yu-Ping An 曾振民 和 安裕平 |
# Latest Journal Club
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# Latest Group Siminar
| Data | Time | Place | Reporter|
| --- | --- | --- | --- |
| 11.25 | 2.30 PM | 6420 | Shao-Jiang Wang |
## Title: *Cosmic inflation from broken conformal symmetry*
## Reporter: Shao-Jiang Wang
| 12.16 | 2.30 PM | 6420 | Fu-Guo Yang |
## Title: * *
## Reporter: Fu-Guo Yang
## Abstract
A period of rapidly accelerating expansion is expected in the early Universe implemented by a scalar field slowly rolling down along an asymptotically flat potential preferred by the current data. In this paper, we point out that this picture of the cosmic inflation with an asymptotically flat potential could emerge from the Palatini quadratic gravity by adding the matter field in such a way to break the local gauged conformal symmetry in both kinetic and potential terms. The metric Einstein gravity with a positive cosmological constant could be recovered either in the absence of the matter field or by adding the matter field in a way that preserves the local gauged conformal symmetry.
In this seminar, some work progress about holographic superconductor from superstrings will be introduced. A non zero-temperature superconducting black hole was constructed and a critical temperature, below which a charged condensate forms with a second order phase transition, is finded. we generalize the no inner Cauchy horizon theorem to the theory of Stückelberg form and can easily prove that there is no inner Cauchy horizon for those kinds of models. Besides, the dynamics are analyzed both inside and outside the event horizon. The existence of Kasner structure is also proved. Then, he holographic complexity in superconductors from superstrings was computed to understand the quantum gravity effect via the quantum information approach. Finally, we give some discussions about the results and look foward to the future.
## References
- [Arxiv:2110.14718](https://arxiv.org/abs/2110.14718) *Cosmic inflation from broken conformal symmetry* by *Rong-Gen Cai, Yu-Shi Hao* and *Shao-Jiang Wang*.
<!-- - [Arxiv:2110.14718](https://arxiv.org/abs/2110.14718) *Cosmic inflation from broken conformal symmetry* by *Rong-Gen Cai, Yu-Shi Hao* and *Shao-Jiang Wang*. -->
<!-- - [Arxiv:2109.01402](https://arxiv.org/abs/2109.01402) *A shallow dark matter halo in Ultra Diffuse Galaxy AGC 242019: are UDGs structurally similar to low surface brightness galaxies?* by *Chris B.Brook* et al. -->
# ITP-CAS Gravity and Cosmology Seminar:
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