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DTSTART:20230312T070000
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DTSTART;TZID=America/Toronto:20230829T120000
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SUMMARY:IQC Student Seminar Featuring Shayan Majidy
CLASS:PUBLIC
DESCRIPTION:Summary \n\nCRITICAL PHASE AND SPIN SHARPENING IN SU(2)-SYMMETR
 IC MONITORED\nQUANTUM CIRCUITS\n\nMonitored quantum circuits exhibit entan
 glement transitions at certain\nmeasurement rates. Such a transition separ
 ates phases characterized by\nhow much information an observer can learn f
 rom the measurement\noutcomes. We study SU(2)-symmetric monitored quantum 
 circuits\, using\nexact numerics and a mapping onto an effective statistic
 al-mechanics\nmodel. Due to the symmetry's non-Abelian nature\, measuring 
 qubit pairs\nallows for nontrivial entanglement scaling even in the\nmeasu
 rement-only limit. We find a transition between a volume-law\nentangled ph
 ase and a critical phase whose diffusive purification\ndynamics emerge fro
 m the non-Abelian symmetry. Additionally\, we\nidentify a “spin-sharpeni
 ng transition.” Across the transition\,\nthe rate at which measurements 
 reveal information about the total spin\nquantum number changes parametric
 ally with system size.\n\nReference\nhttps://journals.aps.org/prb/abstract
 /10.1103/PhysRevB.108.054307\n[https://journals.aps.org/prb/abstract/10.11
 03/PhysRevB.108.054307]\n\nADD EVENT TO CALENDAR\n\nApple [https://www.add
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DTSTAMP:20231204T133352Z
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