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DTSTART:20170326T030000
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DTSTART:20171029T020000
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BEGIN:VEVENT
DTSTAMP:20260427T100739Z
UID:593e7ce54d84d407143476@ist.ac.at
DTSTART:20170919T110000
DTEND:20170919T123000
DESCRIPTION:Speaker: Fabian Grusdt\nhosted by Mikhail Lemeshko\nAbstract: B
 y doping a fermionic Mott insulator at half filling\, the anti-ferromagnet
 ic (AFM) ground state is destroyed and a high-Tc superconducting phase can
  be reached. To unravel the physics of the hole-doped regime\, an importan
 t first step is to understand the behavior of a single hole in the AFM. In
  analogy with the polaron problem\, where a mobile impurity interacts with
  a surrounding bath\, one can expect a so-called magnetic polaron to form 
 when a hole is introduced into the AFM. The analogy between these two prob
 lems will be the main topic of this talk. After providing an overview of t
 he Bose polaron problem – an impurity strongly interacting with a Bose-Ei
 nstein condensate – it will be argued that the magnetic polaron is more t
 han just a hole dressed by magnetic excitations. Instead\, the strong corr
 elations in this system require a different physical picture\, which will 
 be provided in the strong-coupling limit where the hole-hopping is much fa
 ster than spin-exchange interactions. Very recently\, the Heisenberg AFM h
 as become accessible for quantum-gas microscopes with ultracold fermions i
 n optical lattices. A brief overview of recent experimental progress will 
 also be given.\n
LOCATION:Big Seminar room Ground floor / Office Bldg West (I21.EG.101)\, IS
 TA
ORGANIZER:jdeanton@ist.ac.at
SUMMARY:Fabian Grusdt: Meson theory of magnetic polarons in hole-doped anti
 -ferromagnets
URL:https://talks-calendar.ista.ac.at/events/820
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