Time: 10:00 am (UTC/GMT+8:00, Beijing/Shanghai), Oct. 11 (Mon.), 2021

Zoom URL: https://us06web.zoom.us/j/9495597503?pwd=UFVMUUVxb3pDUHRkWEFQY3MzRjJYUT09

Meeting ID: 949 559 7503

Password: 2021

Speaker: Liujun Zou (Perimeter Inst.)

Abstract:

I will present some recent works that aim at understanding non-Fermi liquids (nFLs). I will start with a review of experimental motivations of nFLs, and discuss an established framework for them, which is based on a patch construction and controlled expansion. Then I will present our recent result obtained by applying this framework to a special type of nFL, known as marginal Fermi liquid (MFL). In particular, I will discuss the UV/IR mixing in MFLs, which dictates that the low-energy properties of the MFL can depend sensitively on the high-energy properties. This UV/IR mixing suggests that the universal physics of MFLs may deviate significantly from the previous expectation. It also indicates that the established framework for nFLs is actually inadequate to correctly capture their low-energy physics.

References:

[1]. Zou, Chowdhury, arXiv: 2002.02972

[2]. Zou, Chowdhury, arXiv: 2004.14391

[3]. Ye, Lee, Zou, arXiv: 2109.00004

About the speaker：

Education background:

Dr. Zou obtained his bachelor's degree from Tsinghua University in 2013. In 2019, he obtained his Ph.D. degree from Harvard University. Now he is John Bardeen postdoctoral fellow at Perimeter Institute.

Research interests:

Without being confined to particular subjects or limited to specific approaches, he is interested in all physics that uncovers the truth and beauty of Nature. So far his focus has been on the understanding of quantum phases of matter and the transitions between them, with special focus on quantum criticality. Recently he has also started working on non-equilibrium many-body physics.