Video URL
https://pirsa.org/22020068Measurement-induced criticality and charge-sharpening transitions
APA
Vasseur, R. (2022). Measurement-induced criticality and charge-sharpening transitions. Perimeter Institute for Theoretical Physics. https://pirsa.org/22020068
MLA
Vasseur, Romain. Measurement-induced criticality and charge-sharpening transitions. Perimeter Institute for Theoretical Physics, Feb. 14, 2022, https://pirsa.org/22020068
BibTex
@misc{ scivideos_PIRSA:22020068, doi = {10.48660/22020068}, url = {https://pirsa.org/22020068}, author = {Vasseur, Romain}, keywords = {Quantum Matter}, language = {en}, title = {Measurement-induced criticality and charge-sharpening transitions}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2022}, month = {feb}, note = {PIRSA:22020068 see, \url{https://scivideos.org/index.php/pirsa/22020068}} }
Romain Vasseur University of Massachusetts Amherst
Abstract
Monitored quantum circuits (MRCs) exhibit a measurement-induced phase transition between area-law and volume-law entanglement scaling. In this talk, I will argue that MRCs with a conserved charge additionally exhibit two distinct volume-law entangled phases that cannot be characterized by equilibrium notions of symmetry-breaking or topological order, but rather by the non-equilibrium dynamics and steady-state distribution of charge fluctuations. These include a charge-fuzzy phase in which charge information is rapidly scrambled leading to slowly decaying spatial fluctuations of charge in the steady state, and a charge-sharp phase in which measurements collapse quantum fluctuations of charge without destroying the volume-law entanglement of neutral degrees of freedom. I will present some statistical mechanics and effective field theory approaches to such charge-sharpening transitions.
Zoom Link: https://pitp.zoom.us/meeting/register/tJcqc-ihqzMvHdW-YBm7mYd_XP9Amhypv5vO