BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Drupal iCal API//EN X-WR-CALNAME:Events items teaser X-WR-TIMEZONE:America/Toronto BEGIN:VTIMEZONE TZID:America/Toronto X-LIC-LOCATION:America/Toronto BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:20210314T070000 END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:20211107T060000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:6831bfe8db6a0 DTSTART;TZID=America/Toronto:20220117T113000 SEQUENCE:0 TRANSP:TRANSPARENT DTEND;TZID=America/Toronto:20220117T113000 URL:/combinatorics-and-optimization/events/algebraic-gr aph-theory-seminar-chris-godsil-36 SUMMARY:Algebraic Graph Theory Seminar - Chris Godsil CLASS:PUBLIC DESCRIPTION:Summary \n\nTITLE: Laplacian States\n\nSpeaker:\n Chris Godsil \n\nAffiliation:\n University of À¶Ý®ÊÓÆµ\n\nZoom:\n Conatact Sabrina Lato \n\nABSTRACT:\n\nIt is customary to assume that the initial state of a con tinuous\nquantum walk on a graph $X$ is a vertex. However the Laplacian ma trix\nof a graph with vertex set $V(X)$ is positive semidefinite\, and can be\nscaled to produce a density matrix\, and so provides an initial state \nfor a walk on $X$.\n DTSTAMP:20250524T124736Z END:VEVENT END:VCALENDAR