Black hole radiation from non-vacuum initial states

Add to your list(s) Download to your calendar using vCal

• Ali Akil, Hong Kong University
• Friday 25 April 2025, 13:00-14:00
• Potter room/Zoom: https://cam-ac-uk.zoom.us/j/88420112623?pwd=uogMItLtNT8pn4aks1hO4nJVmonbpV.1.

If you have a question about this talk, please contact Xi Tong.

Hawking derived the black hole thermal radiation state by comparing the vacuum state at the future null infinity I+ with that at the past null infinity I-. We revisit Hawking’s computation, considering a non-vacuum initial state at the past of the black hole geometry. We show in which cases the black hole radiation arising from the initial matter state differs from the well-known thermal state. We moreover classify what initial states are distinguishable from one another through measurements on the black hole radiation in this framework. Finally we provide a physical interpretation of the classification, using Algebraic Quantum Field Theory localisation.

This talk is part of the DAMTP Friday GR Seminar series.

This talk is included in these lists:

• All CMS events
• All Talks (aka the CURE list)
• CMS Events
• Cambridge Astronomy Talks
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• DAMTP Friday GR Seminar
• DAMTP info aggregator
• Interested Talks
• Kavli Institute for Cosmology Talk Lists
• Potter room/Zoom: https://cam-ac-uk.zoom.us/j/88420112623?pwd=uogMItLtNT8pn4aks1hO4nJVmonbpV.1
• Priscilla
• School of Physical Sciences
• bld31

Note that ex-directory lists are not shown.