BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Dynamical magic transitions in monitored Clifford+T circuits - Mir
 cea-Andrei Bejan\, University of Cambridge
DTSTART:20240215T141500Z
DTEND:20240215T151500Z
UID:TALK212290@talks.cam.ac.uk
CONTACT:Subhayan Roy Moulik
DESCRIPTION:arXiv:2312.00132 joint work with Campbell McLauchlan and Benja
 min Béri\n\nRecently discovered measurement-induced transitions (MIPTs) i
 n entanglement are phase transitions in classical simulability. However\, 
 some highly-entangling dynamics (e.g.\, integrable systems or Clifford cir
 cuits) are easy to classically simulate. Here\, we study simulability tran
 sitions beyond entanglement by asking how the dynamics of magic competes w
 ith measurements. We find distinct MIPTs in magic\, simulability\, and ent
 anglement. We identify dynamical "stabilizer-purification" as the mechanis
 m driving the magic transition. En route\, we use Pauli-based computation 
 to distill the quantum essence of the dynamics to a set of measurements. W
 e link stabilizer-purification to "magic fragmentation" wherein these meas
 urements separate into disjoint\, O(1)-weight blocks\, and relate this to 
 the spread of magic in the original circuit becoming arrested.
LOCATION:MR2
END:VEVENT
END:VCALENDAR