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SUMMARY:Greg Kaplanek (McMaster University)
DTSTART:20210308T190000Z
DTEND:20210308T200000Z
DTSTAMP:20260423T023012Z
UID:UKYhepth/32
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/UKYhepth/32/
 ">Hot qubits on the horizon</a>\nby Greg Kaplanek (McMaster University) as
  part of Theoretical Physics Seminars (Kentucky)\n\n\nAbstract\nPerturbati
 on theory for gravitating quantum systems tends to\nfail at very late time
 s (a type of perturbative breakdown known as\nsecular growth). We argue th
 at gravity is best treated as a\nmedium/environment in such situations\, w
 here reliable late-time\npredictions can be made using tools borrowed from
  quantum optics. To\nshow how this works\, we study the explicit example o
 f a qubit hovering\njust outside the event horizon of a Schwarzschild blac
 k hole (coupled to\na real scalar field) and reliably extract the late-tim
 e behaviour for\nthe qubit state. At very late times\, the so-called Unruh
 -DeWitt detector\nis shown to asymptote to a thermal state at the Hawking 
 temperature.\n
LOCATION:https://researchseminars.org/talk/UKYhepth/32/
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