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DTSTAMP:20260424T153207Z
UID:1688048100@ist.ac.at
DTSTART:20230629T161500
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DESCRIPTION:Speaker: David Mitrouskas\nhosted by Robert Seiringer\nAbstract
 : We consider the Fröhlich polaron confined to a bounded region. The 
 Fröhlich polaron is a model for an electron interacting with the quantiz
 ed optical phonons of a polar crystal. It provides a simple and well-stud
 ied model of nonrelativistic quantum field theory. In this talk\, we wil
 l discuss the low-energy spectrum of the self-adjoint Hamiltonian desc
 ribing this system when the coupling between the electron and the quantum
  field is large. Concretely\, we establish an asymptotic series for every
  low-lying eigenvalue in negative powers of the coupling constant. The c
 oefficients of the series are derived through a two-fold perturbation appr
 oach\, involving expansions around the Pekar minimizer of the semiclass
 ical energy and around the low-energy eigenstates of the quantum field.
  
LOCATION:Heinzel Seminar Room (I21.EG.101)\, Office Building West\, ISTA\, 
 ISTA
ORGANIZER:birgit.oosthuizen-noczil@ist.ac.at 
SUMMARY:David Mitrouskas: Asymptotic series for low-energy excitations of t
 he Fröhlich polaron at strong coupling
URL:https://talks-calendar.ista.ac.at/events/4168
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