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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2109
DTSTART:20110207T223000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T134518Z
LAST-MODIFIED:20110127T195201Z
LOCATION:5310 Chamberlin
SUMMARY:Weyl Problem and the Casimir Effect in Spherical Shell Geometr
 y\, Condensed Matter Theory Group Seminar\, Hussain Zaidi\, University
  of Virginia
DESCRIPTION:We compute the generic mode sum that quantifies the effect
  of the change of spectrum of a harmonic field when a spherical shell 
 is inserted into the vacuum. This encompasses a variety of problems in
 cluding the Weyl spectral problem and the Casimir effect of quantum el
 ectrodynamics. The connection between the Weyl problem and the Casimir
  energy allows us to resolve a long-standing controversy regarding the
  question of universality of the Casimir self-energy. Specifically we 
 demonstrate that in the case of a scalar field obeying Dirichlet bound
 ary conditions on the shell surface the Casimir self-energy is cutoff-
 dependent\, while in the case of a conductive shell the Casimir self-e
 nergy is universal.
URL:https://www.physics.wisc.edu/events/?id=2109
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