BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:Quantum Theory Seminar - Sam Garratt (UC Berkeley)
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260719T115634Z
UID:tag:localist.com\,2008:EventInstance_44314491685738
DTSTART:20230929T193000Z
DTEND:20230929T203000Z
DESCRIPTION:Title: Probing post-measurement entanglement without post-selec
 tion\n\nAbstract: I will discuss the problem of observing quantum collecti
 ve phenomena which arise from large numbers of measurements. A prominent e
 xample is the measurement-induced entanglement transition\, a close relati
 ve of transitions in the hardness of random circuit sampling. Directly obs
 erving these phenomena is difficult because\, in order to distinguish the 
 effects of measurement from dephasing\, it is necessary that the same sets
  of outcomes occur multiple times\; the time required for this is in gener
 al exponentially large in the number of measurements performed. An indirec
 t approach\, which avoids this exponential 'post-selection problem'\, is t
 o construct cross-correlations between experimental data and the results o
 f simulations on classical computers. Developing this idea\, I will show h
 ow to both upper and lower bound the average post-measurement entanglement
  entropy without post-selection. This result shows that it is possible to 
 efficiently and unambiguously observe measurement-induced collective pheno
 mena. \n\nFaculty Hosts: Eun-Ah Kim\, Chao-Ming Jian\, and Debanjan Chowdh
 ury
LOCATION:Clark Hall 701\, Physical Sciences Building Rm 403
SUMMARY:Quantum Theory Seminar - Sam Garratt (UC Berkeley)
URL;VALUE=URI:https://events.cornell.edu/event/quantum_theory_seminar_-_sam
 _garratt_uc_berkeley
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260719T115634Z
UID:tag:localist.com\,2008:EventInstance_44314503504297
DTSTART:20231020T193000Z
DTEND:20231020T203000Z
DESCRIPTION:Title: Probing post-measurement entanglement without post-selec
 tion\n\nAbstract: I will discuss the problem of observing quantum collecti
 ve phenomena which arise from large numbers of measurements. A prominent e
 xample is the measurement-induced entanglement transition\, a close relati
 ve of transitions in the hardness of random circuit sampling. Directly obs
 erving these phenomena is difficult because\, in order to distinguish the 
 effects of measurement from dephasing\, it is necessary that the same sets
  of outcomes occur multiple times\; the time required for this is in gener
 al exponentially large in the number of measurements performed. An indirec
 t approach\, which avoids this exponential 'post-selection problem'\, is t
 o construct cross-correlations between experimental data and the results o
 f simulations on classical computers. Developing this idea\, I will show h
 ow to both upper and lower bound the average post-measurement entanglement
  entropy without post-selection. This result shows that it is possible to 
 efficiently and unambiguously observe measurement-induced collective pheno
 mena. \n\nFaculty Hosts: Eun-Ah Kim\, Chao-Ming Jian\, and Debanjan Chowdh
 ury
LOCATION:Clark Hall 701\, Physical Sciences Building Rm 403
SUMMARY:Quantum Theory Seminar - Sam Garratt (UC Berkeley)
URL;VALUE=URI:https://events.cornell.edu/event/quantum_theory_seminar_-_sam
 _garratt_uc_berkeley
CATEGORIES:Seminar
END:VEVENT
END:VCALENDAR