Cornell University

This is a past event. Its details are archived for historical purposes.

The contact information may no longer be valid.

Please visit our current events listings to look for similar events by title, location, or venue.

Quantum Theory Seminar - Sam Garratt (UC Berkeley)

Friday, October 20, 2023 at 3:30pm to 4:30pm

Clark Hall 701, Physical Sciences Building Rm 403

Title: Probing post-measurement entanglement without post-selection

Abstract: 
I will discuss the problem of observing quantum collective phenomena which arise from large numbers of measurements. A prominent example is the measurement-induced entanglement transition, a close relative of transitions in the hardness of random circuit sampling. Directly observing 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 general exponentially large in the number of measurements performed. An indirect approach, which avoids this exponential 'post-selection problem', is to construct cross-correlations between experimental data and the results of simulations on classical computers. Developing this idea, I will show how 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 phenomena. 

Faculty Hosts: Eun-Ah KimChao-Ming Jian, and Debanjan Chowdhury

Streaming site:

https://www.youtube.com/@quantumtheoryseminar6651/streams

Subscribe
Google Calendar iCal Outlook
Event Type

Seminar

Departments

LASSP

University Themes

Research

Tags

quantum_site, lassp, quantum_lassp

Cost

Free

Contact E-Mail

lassp-seminars@cornell.edu

Contact Name

Meredith Collins

Speaker

Sam Garratt

Speaker Affiliation

UC Berkeley

Dept. Web Site

https://www.lassp.cornell.edu/

Disability Access Information

If you need accommodations to participate in this event, please contact us as soon as possible.

Open To

Open to the Public

Recent Activity