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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-6828
DTSTART:20220211T190000Z
DTEND:20220211T200000Z
DTSTAMP:20260414T144218Z
LAST-MODIFIED:20220207T220749Z
LOCATION:Chamberlin 5280
SUMMARY:A Puncture in the Euclidean Black Hole\, Theory Seminar (High 
 Energy/Cosmology)\, Yoav Zigdon\, Ben-Gurion University of the Negev
DESCRIPTION:We consider the backreaction of the winding zero mode on t
 he cigar geometry. We focus on the case of the $SL(2\,R)_k/U(1)$ cigar
  associated with e.g. the near-horizon limit of k NS5 black-branes. We
  solve the equations of motion numerically in the large k limit as a f
 unction of the amplitude of the winding mode at infinity. We find that
  there is a critical amplitude $A_c=\\exp(-\\gamma/2)$ that admits a c
 ritical solution. In string theory\, the exact CFT description of the 
 $SL(2\,R)_k/U(1)$ cigar\, fixes completely the winding amplitude\, $A_
 s$\, at infinity. We find that in the large $k$ limit there is an exac
 t agreement $A_c=A_s$. The critical solution is a cigar with a punctur
 e at its tip\; consequently\, the black hole entropy is carried entire
 ly by the winding condensate. We comment on the Lorentzian interpretat
 ion of the solution.
URL:https://www.physics.wisc.edu/events/?id=6828
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