題目：Two indices Sachdev-Ye-Kitaev model
報告人：葉錦武 教授（首都師范大學(xué)， Mississippi State university） 
時  間：2019年1月9日(周三)上午 10:00
地  點：北京理工大學(xué)中心教學(xué)樓501,，良鄉(xiāng)物理實驗中心229轉(zhuǎn)播

摘要 
We study the original Sachdev-Ye (SY) model in its Majorana fermion representation which can be called the two indices Sachdev-Ye-Kitaev (SYK) model. Its advantage over the original SY model in the SU(M)  complex fermion representation is that it need no local constraints, so a 1/M  expansion can be more easily performed.  Its advantage over the 4 indices Sachdev-Ye-Kitaev (SYK) model is that it has only two site indices $ J_{ij} $ instead of four indices  J_{ijkl} , so it may fit the bulk string theory better. We will review the most recent dramatic progress in SYK models, its impacts in string theory, quantum gravity, quantum information processing, Eigenstate Thermalization Hypothesis ( ETH ), many body localizations  etc. Then we will discuss several new features of the two indices SYK models such as its quantum spin glass instabilities,  new operator contents, its possible new gravity dual etc. We may also briefly discuss the random matrix classifications of quantum chaos in four indices colored SYK models and its possible connections to the classifications of topological phases of matter.

簡歷：
葉錦武教授是美國耶魯大學(xué)理論物理博士,。他現(xiàn)在是首都師范大學(xué)長江學(xué)者教授和美國密西西比州立大學(xué)教授. 葉教授主要研究領(lǐng)域是強相互作用的電子, 玻色子, 自旋，光子等的合作現(xiàn)象和量子或拓?fù)湎嘧兝碚?，他的研究還涉及超對稱性破缺,，共形場論和各種量子或拓?fù)湎嗟牧孔右ε肌Ｋ蚕矚g研究中國人民解放軍的歷史, 特別是開國戰(zhàn)神粟裕的戰(zhàn)略和戰(zhàn)術(shù)對自然科學(xué)的指導(dǎo)作用.    

聯(lián)系方式：物理學(xué)院辦公室68913163
邀請人： 揚帆
網(wǎng)    址：www.physics.bit.edu.cn