BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-7953
DTSTART:20221013T160000Z
DTEND:20221013T230000Z
DTSTAMP:20260414T153806Z
LAST-MODIFIED:20221012T230005Z
LOCATION:5310 Chamberlin
SUMMARY:Measurement-induced Phase Transitions in the Dynamics of Quant
 um Entanglement\, R. G. Herb Condensed Matter Seminar\, Brian Skinner 
 \, Ohio State University
DESCRIPTION:When a quantum system evolves under unitary dynamics\, as 
 produced by either a Hamiltonian or by a sequence of gates inside a qu
 antum computer\, its various component parts tend to become more entan
 gled with each other. Making measurements\, on the other hand\, tends 
 to reduce this entanglement by collapsing some of the system's degrees
  of freedom. In this talk I'll consider what happens to the entangleme
 nt when a quantum many-body system undergoes both unitary evolution an
 d sporadic measurements. I'll show that the competition between these 
 two effects leads to a new kind of dynamical phase transition\, such t
 hat when the measurement rate is lower than a critical value the dynam
 ics is "entangling"\, while a higher-than-critical measurement rate le
 ads to a "disentangling" phase. I will discuss our work demonstrating 
 the existence of this transition\, as well as more recent efforts to f
 ind exact solutions for its critical properties. I will show how intui
 tion from classical percolation in disordered conductors played a key 
 role in our understanding of the transition.
URL:https://www.physics.wisc.edu/events/?id=7953
END:VEVENT
END:VCALENDAR