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SUMMARY:Non-modal effects: Transient Superradiance
DTSTART:20260219T110000Z
DTEND:20260219T130000Z
DTSTAMP:20260620T135540Z
UID:5e0fb181-6e9c-4c78-b2a6-c28db904119f
SEQUENCE:2
CREATED:20260216T141727Z
DESCRIPTION:Black hole quasinormal modes are governed by a non-normal evol
 ution operator with respect to a natural choice of inner product\, and thu
 s do not form a complete and orthogonal basis. This allows linear perturba
 tions around a black hole spacetime to potentially exhibit large-amplitude
  growth at finite time\, despite asymptotic decay at later times. In this 
 talk\, I will exemplify this mechanism by discussing a transient form of s
 uperradiance\, drawing similarities to the transition to turbulence in Nav
 ier-Stokes shear flows.
LAST-MODIFIED:20260216T141737Z
LOCATION:DF Seminar Room (2-8.3)\, 2nd floor of Physics Building
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/non-modal-effects-transien
 t-superradiance/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="4kis5">Black hole quasinor
 mal modes are governed by a non-normal evolution operator with respect to 
 a natural choice of inner product\, and thus do not form a complete and or
 thogonal basis. This allows linear perturbations around a black hole space
 time to potentially exhibit large-amplitude growth at finite time\, despit
 e asymptotic decay at later times. In this talk\, I will exemplify this me
 chanism by discussing a transient form of superradiance\, drawing similari
 ties to the transition to turbulence in Navier-Stokes shear flows.</p>
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