Bulletin of the American Physical Society
2024 APS March Meeting
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session B31: Measurement Induced Criticality in Many-Body Systems
11:30 AM–2:30 PM,
Monday, March 4, 2024
Room: 102C
Sponsoring
Units:
GSNP DQI
Chair: Gabriel Landi; Guilherme Fiusa, University of Rochester
Abstract: B31.00009 : Measurement and feedforward induced entanglement negativity transition*
1:30 PM–1:42 PM
Presenter:
Ramis Movassagh
(Google Quantum AI)
Authors:
Ramis Movassagh
(Google Quantum AI)
Alireza Seif
(IBM Quantum)
Yu-Xin Wang
(University of Chicago)
Aashish A Clerk
(University of Chicago)
in quantum systems. We numerically and analytically investigate commuting random measurement
and feedforward (MFF) processes, and find a sharp transition in their ability to generate entan-
glement negativity as the number of MFF channels varies. We also establish a direct connection
between these findings and transitions induced by random dephasing from an environment with
broken time-reversal symmetry. In one variant of the problem, we employ free probability theory to
rigorously prove the transition’s existence. Furthermore, these MFF processes have dynamic circuit
representations that can be experimentally explored on current quantum computing platforms.
*This work was supported by the Air Force Office of Scientific Research MURI program under Grant No. FA9550-19-1-0399, and the Simons Foundation through a Simons Investigator award (Grant No. 669487). AS was partially supported by a Chicago Prize Postdoctoral Fellowship in Theoretical Quantum Science.
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