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SUMMARY:Quantum Diamonds
DTSTART:20261007T120000Z
DTEND:20261007T130000Z
DTSTAMP:20261014T072500Z
UID:indico-event-1704954@indico.cern.ch
DESCRIPTION:Speakers: Kathryn Zurek (Caltech)\n\nWe consider the quantizat
 ion of gravity at finite-sized causal horizons—causal diamonds--in 4-d M
 inkowski space.  Utilizing the covariant phase space\, we identify the de
 grees-of-freedom that\, upon canonical quantization\, determine the commut
 ators—one proportional to the area of the horizon and a second depending
  on a time shift operator.  We show that the area and time shift operator
 s directly map to the soft graviton and Goldstone arising from the breakin
 g of supertranslation symmetry.  We construct a density matrix describing
  the quantum state of the diamond in terms of these degrees-of-freedom\, a
 nd show how the geometry fluctuates.  Lastly\, since finite causal diamon
 ds are measurable in experiments\, we comment on how infrared effects migh
 t enter into observables in quantum gravity.\n\nhttps://indico.cern.ch/eve
 nt/1704954/\n\nZoom: https://cern.zoom.us/j/67346292748?pwd=ZnRkQWh0ZXVFQT
 c5K256QW5NcEcrdz09
LOCATION:4/3-006 - TH Conference Room (CERN)
URL:https://indico.cern.ch/event/1704954/
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