Measurement phase transitions and statistical mechanics

PIRSA ID: 20120000
Event Type: Seminar
Domaine(s) scientifique(s) :
Quantum Matter
Date de fin :
Speaker(s):
  • Adam Nahum, University of Oxford

A many-body quantum system that is continually monitored by an external observer may be in distinct dynamical phases, depending on whether or not the observer’s repeated local measurements prevent the buildup of long-range entanglement. The universal properties of the “measurement phase transitions” between these phases remain a challenge. In this talk I will describe new theoretical approaches to measurement phase transitions, making connections with problems in statistical mechanics such as disordered magnets and travelling waves. I will show that exact results are possible in some regimes, including for quantum circuits with all-to-all interactions. (Based on arxiv:2009.11311)