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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-5412
DTSTART:20200410T190000Z
DTEND:20200410T200000Z
DTSTAMP:20260415T041157Z
LAST-MODIFIED:20200407T183250Z
LOCATION:https://cuboulder.zoom.us/webinar/register/WN_F46RnreyTe6xzFt
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SUMMARY:Virtual AMO Seminar: Transport and spectral properties of hot 
 Fermi-Hubbard systems\, Atomic Physics Seminar\, Waseem Bakr\, Princet
 on University
DESCRIPTION:The normal state of high-temperature superconductors exhib
 its anomalous transport and spectral properties that are poorly unders
 tood. Cold atoms in optical lattices have been used to realize the cel
 ebrated Fermi-Hubbard model\, widely believed to capture the essential
  physics of these materials. The recent development of fermionic quant
 um gas microscopes has enabled studying Hubbard systems with single-si
 te resolution and extracting equilibrium charge and spin correlations.
  In this talk\, I will report on using a quantum gas microscope to pro
 be the transport and spectral properties of atomic Fermi-Hubbard syste
 ms. First\, I will describe the development of a technique to measure 
 microscopic charge diffusion\, and hence resistivity\, in doped Mott i
 nsulators. We have found that this resistivity exhibits a linear depen
 dence on temperature and violates the Mott-Ioffe-Regel limit\, two sig
 natures 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 transpor
 t\, allowing the extraction of the infinite temperature heat diffusivi
 ty of the system [2]. Finally\, I will describe the development of ang
 le-resolved photoemission spectroscopy (ARPES) for Hubbard systems and
  its application to studying pseudogap physics in an attractive Hubbar
 d system across the BEC-BCS crossover [3]\, setting the stage for futu
 re studies of the pseudogap regime in repulsive Hubbard systems.<br>
\
 n<br>
\n[1] P. Brown et. al.\, Science 363\, 379 (2019)<br>
\n[2] E. G
 uardado-Sanchez et. al.\, PRX 10\, 011043 (2020)<br>
\n[3] P. Brown et
 . al.\, Nature Physics 16\, 26 (2020)
URL:https://www.physics.wisc.edu/events/?id=5412
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