BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Black hole radiation from non-vacuum initial states - Ali Akil\, 
 Hong Kong University
DTSTART:20250425T120000Z
DTEND:20250425T130000Z
UID:TALK229969@talks.cam.ac.uk
CONTACT:Xi Tong
DESCRIPTION:Hawking derived the black hole thermal radiation state by comp
 aring the vacuum state at the future null infinity I+ with that at the pas
 t null infinity I-. We revisit Hawking's computation\, considering a non-v
 acuum initial state at the past of the black hole geometry. We show in whi
 ch cases the black hole radiation arising from the initial matter state di
 ffers from the well-known thermal state. We moreover classify what initial
  states are distinguishable from one another through measurements on the b
 lack hole radiation in this framework. Finally we provide a physical inter
 pretation of the classification\, using Algebraic Quantum Field Theory lo
 calisation.
LOCATION:Potter room/Zoom: https://cam-ac-uk.zoom.us/j/88420112623?pwd=uog
 MItLtNT8pn4aks1hO4nJVmonbpV.1
END:VEVENT
END:VCALENDAR