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DTSTART;TZID=America/Toronto:20230829T120000
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URL:https://uwaterloo.ca/institute-for-quantum-computing/events/iqc-student
 -seminar-featuring-shayan-majidy-0
LOCATION:QNC - Quantum Nano Centre 200 University Avenue West QNC 1201 Wate
 rloo ON N2L 3G1 Canada
SUMMARY:IQC Student Seminar Featuring Shayan Majidy
CLASS:PUBLIC
DESCRIPTION:CRITICAL PHASE AND SPIN SHARPENING IN SU(2)-SYMMETRIC MONITORED
 \nQUANTUM CIRCUITS\n\nMonitored quantum circuits exhibit entanglement tran
 sitions at certain\nmeasurement rates. Such a transition separates phases 
 characterized by\nhow much information an observer can learn from the meas
 urement\noutcomes. We study SU(2)-symmetric monitored quantum circuits\, u
 sing\nexact numerics and a mapping onto an effective statistical-mechanics
 \nmodel. Due to the symmetry's non-Abelian nature\, measuring qubit pairs\
 nallows for nontrivial entanglement scaling even in the\nmeasurement-only 
 limit. We find a transition between a volume-law\nentangled phase and a cr
 itical phase whose diffusive purification\ndynamics emerge from the non-Ab
 elian symmetry. Additionally\, we\nidentify a “spin-sharpening transitio
 n.” Across the transition\,\nthe rate at which measurements reveal infor
 mation about the total spin\nquantum number changes parametrically with sy
 stem size.\n\nReference\nhttps://journals.aps.org/prb/abstract/10.1103/Phy
 sRevB.108.054307\n[https://journals.aps.org/prb/abstract/10.1103/PhysRevB.
 108.054307]\n\nADD EVENT TO CALENDAR\n\nApple [https://www.addevent.com/ev
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DTSTAMP:20260407T070748Z
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