<< April 2022 >>
 
 >>
 >>
 >>
 >>
 >>
Sun Mon Tue Wed Thu Fri Sat
   1   2 
 3   4   5   6   7   8   9 
 10   11   12   13   14   15   16 
 17   18   19   20   21   22   23 
 24   25   26   27   28   29   30 
 
Add an Event

Theory Seminar (High Energy/Cosmology)

<< Fall 2021 Spring 2022 Summer 2022 >>
Subscribe to receive email announcements of events

Events on Friday, April 8th, 2022

Hot Qubits on the Horizon
Time: 1:00 pm
Place: Chamberlin 5280
Speaker: Greg Kaplanek, McMaster University, Perimeter Institute
Abstract: Perturbation theory for gravitating quantum systems tends to fail at very late times (a type of perturbative breakdown known as secular growth). We argue that gravity is best treated as a medium/environment in such situations, where reliable late-time predictions can be made using tools borrowed from quantum optics. To show how this works, we study the explicit example of a qubit hovering just outside the event horizon of a Schwarzschild black hole (coupled to a real scalar field) and reliably extract the late-time behaviour for the qubit state. At very late times, the so-called Unruh-DeWitt detector is shown to asymptote to a thermal state at the Hawking temperature.
Host: George Wojcik
Add this event to your calendar

©2013 Board of Regents of the University of Wisconsin System