<< April 2020 >>
 
 >>
 >>
 >>
 >>
 >>
Sun Mon Tue Wed Thu Fri Sat
   1   2   3   4 
 5   6   7   8   9   10   11 
 12   13   14   15   16   17   18 
 19   20   21   22   23   24   25 
 26   27   28   29   30   
 
Add an Event Edit This Event

Atomic Physics Seminars
<< Fall 2019 Spring 2020 Summer 2020 >>
Subscribe to receive email announcements of events
Virtual AMO Seminar: Transport and spectral properties of hot Fermi-Hubbard systems
Date: Friday, April 10th
Time: 2:00 pm - 3:00 pm
Place:
Speaker: Waseem Bakr, Princeton University
Abstract: The normal state of high-temperature superconductors exhibits anomalous transport and spectral properties that are poorly understood. Cold atoms in optical lattices have been used to realize the celebrated Fermi-Hubbard model, widely believed to capture the essential physics of these materials. The recent development of fermionic quantum gas microscopes has enabled studying Hubbard systems with single-site resolution and extracting equilibrium charge and spin correlations. In this talk, I will report on using a quantum gas microscope to probe the transport and spectral properties of atomic Fermi-Hubbard systems. First, I will describe the development of a technique to measure microscopic charge diffusion, and hence resistivity, in doped Mott insulators. We have found that this resistivity exhibits a linear dependence on temperature and violates the Mott-Ioffe-Regel limit, two signatures of strange metallic behavior [1]. Next, I will discuss how we used the same technique to observe sub- diffusive charge transport in tilted Hubbard systems and present a hydrodynamic model that explains this observation in terms of an interplay of charge and heat transport, allowing the extraction of the infinite temperature heat diffusivity of the system [2]. Finally, I will describe the development of angle-resolved photoemission spectroscopy (ARPES) for Hubbard systems and its application to studying pseudogap physics in an attractive Hubbard system across the BEC-BCS crossover [3], setting the stage for future studies of the pseudogap regime in repulsive Hubbard systems.

[1] P. Brown et. al., Science 363, 379 (2019)
[2] E. Guardado-Sanchez et. al., PRX 10, 011043 (2020)
[3] P. Brown et. al., Nature Physics 16, 26 (2020)
Add this event to your calendar

©2013 Board of Regents of the University of Wisconsin System