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### On the applicability of holography in thermodynamic equilibrium

SourceSeminar Date of Publication:May 10,2022
05/10 2022 Seminar
• Title On the applicability of holography in thermodynamic equilibrium
• Speaker Run-Qiu Yang (Tianjin University)
• Date 2022年05月10日 10:30
• Venue Join Zoom Meeting https://zoom.us/j/84945102376?pwd=RHZ3YUVKSEIwWU5GMm5lazJWc1MrZz09 Meeting ID: 849 4510 2376 Passcode: 198287
• Abstract

For a strongly coupled system that has a gravity dual description, we show that the standard holographic dictionary yields a nonnegative susceptibility when the system is in thermodynamic equilibrium.  When the system has no spontaneous condensation or has a spontaneous $\mathbb{Z}_2$-symmetry breaking, we find that the trace energy condition'' is violated in many cases (see Eq.~\eqref{tracebk}). There is a normalized grand potential density that is monotonic as accessing to lower scales, providing a candidate $c$-function characterizing the number of effective degrees of freedom.  Moreover, we find that  some extensively discussed  holography models in the literature are not consistent with holography due to negative susceptibility.

个人简介：

杨润秋，2011年本科毕业于北京师范大学物理系，2016年博士毕业于中科院理论物理研究所，2016-2019年在韩国高等研究院从事博士后研究，2019年11月至今在天津大学工作，主要研究方向为黑洞物理和引力全息对偶等方向。

Contact联系人  王少江