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[5.9]Interesting Dynamics interplay with Symmetry, Topology and Entropy
文章来源:  |  发布时间:2017-04-14  |  浏览:
                                                         Seminar
 
Title: Interesting Dynamics interplay with Symmetry, Topology and Entropy
 
Speaker: Prof. Hui Zhai(翟荟)(Institute for Advanced Study, Tsinghua University)
 
Time: 3:00 PM, May 09th, 2017 (Tuesday)
 
Place: Theoretical Physics Division,319
 
Abstract: In this talk I will discuss several examples of interesting universal dynamics with quantum simulation. In the first example, I will discuss an expansion dynamics of scale invariant quantum gases in a time-dependent harmonic trap, that displays a discrete temporal scaling symmetry, and we term it as “ the Efimovian expansion”. This dynamics reveals the scaling symmetry and the emergent conformal symmetry of strongly interacting quantum system. In the second example, I will discuss quench dynamics from a topological trivial Chern insulator to a topological nontrivial one, and we show how to extract a quantized value from the quench dynamics, that exactly equals to the topological Chern number of the final Hamiltonian after the quench. In the third example, I will prove a theorem that relates the entropy growth after a quench to the out-of-time-ordered correlation that recently discussed in the content of quantum chaos and holographic duality. This three examples reveal the interplay between quantum dynamics with symmetry, topology and entropy, respectively.
 [1] Shujin Deng, Zhe-Yu Shi, Pengpeng Diao, Qianli Yu, Hui Zhai, Ran Qi and Haibin Wu, Science, 353, 371 (2016)
[2] Ce Wang, Pengfei Zhang, Xin Chen, Jinlong Yu and Hui Zhai, arXiv: 1611.03304
[3] Ruihua Fan, Pengfei Zhang, Huitao Shen and Hui Zhai, arXiv: 1608.01914
[4] Jun Li, Ruihua Fan, Hengyan Wang, Bingtian Ye, Bei Zeng, Hui Zhai, Xinhua Peng, Jiangfeng Du, arXiv: 1609.01246
Vidyo: http://vidyo.ihep.ac.cn/flex.html?roomdirect.html&key=MIYnttR57DSWlfYMvF7gr6uXY
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