BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4//
BEGIN:VEVENT
UID:20250917T155924EDT-3443ExTJ07@132.216.98.100
DTSTAMP:20250917T195924Z
DESCRIPTION:Gapless quantum spin chains: multiple dynamics and conformal wa
 vefunctions.\n\nWe study gapless quantum spin chains with spin 1/2 and 1: 
 the Fredkin and Motzkin models. Their entangled groundstates are known exa
 ctly but not their excitation spectra. We first express the groundstates i
 n the continuum which allows for the calculation of spin and entanglement 
 properties in a unified fashion. Doing so\, we uncover an emergent conform
 al-type symmetry\, thus consolidating the connection to a widely studied f
 amily of quantum critical points in 2 spatial dimensions. We then obtain t
 he low lying excited states via large-scale Density Matrix Renormalization
  Group simulations and find that the dynamical exponent is z = 3.2 in both
  cases. Other excited states show a different z\, indicating that these mo
 dels have multiple dynamics. Finally\, we exploit an exact map from the qu
 antum Hamiltonian to the non-equilibrium dynamics of a classical spin chai
 n to shed light on the quantum dynamics. [Refs: 1706.02304\, 1707.02317]\n
DTSTART:20180206T203000Z
DTEND:20180206T213000Z
LOCATION:Room 4336\, CA\, Pav. André-Aisenstadt\, 2920\, ch. de la Tour
SUMMARY:William Witczak-Krempa\, Département de physique\, Université de Mo
 ntréal
URL:/mathstat/channels/event/william-witczak-krempa-de
 partement-de-physique-universite-de-montreal-284398
END:VEVENT
END:VCALENDAR