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SUMMARY:Adam Levine (IAS Princeton)
DTSTART:20210308T173000Z
DTEND:20210308T184500Z
DTSTAMP:20260423T005655Z
UID:HET/13
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HET/13/">Pro
 bing strings with quantum extremal surfaces</a>\nby Adam Levine (IAS Princ
 eton) as part of Purdue HET\n\n\nAbstract\nWe drop a particle or string in
 to vacuum AdS and ask whether the excitation is in the entanglement wedge 
 for a region composed of a Rindler wedge together with a small interval. W
 e compute the quantum fidelity between the state with a particle and the s
 tate without a particle\, which is a direct measure of whether the particl
 e is reconstructable from this region. We find that in a gravitational the
 ory and for a purely chiral probe particle\, the distinction of whether th
 e excitation is in the entanglement wedge or not is sharp\, corresponding 
 precisely with when the excitation passes across the quantum extremal surf
 ace. For a theory with a non-zero string length\, we find that this distin
 ction between when the particle is inside or outside the entanglement wedg
 e becomes fuzzy and depends on the smearing scale of the particle creation
  operator. We comment on an interpretation of this phenomenon in terms of 
 string spreading. Based upon forthcoming work with Ven Chandrasekaran and 
 Tom Faulkner.\n
LOCATION:https://researchseminars.org/talk/HET/13/
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