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BEGIN:VEVENT
DTSTAMP:20260920T192828Z
LAST-MODIFIED:20191125T162117Z
DTSTART:20191204T211500Z
DTEND:20191204T221500Z
UID:event2237@bu.edu
URL:http://physics.bu.edu/internal/events/show/2237
SUMMARY:Kaehler-Dirac fermions and random geometries
DESCRIPTION:Featuring Simon Catterall\, Syracuse University\n\nPart of the 
	HET Seminar Series.\n\nThe Kaehler-Dirac equation offers an alternative to 
	the Dirac equation for the description of fermions. It has the advantage th
	at it does not require the introduction of a vielbein and spin connection o
	n curved spacetimes. Furthermore it admits a simple discretization on such 
	spaces that circumvents the usual fermion doubling problem. I will show tha
	t Kaehler Dirac fermions exhibit an anomaly which is determined by the topo
	logy of the background space and that this anomaly can be computed exactly 
	on a triangulation of that space. This gives rise to a non-zero fermion con
	densate whose value is determined only by the volume of the space. I will a
	lso present results for the meson spectra of such theories in candidate the
	ories of quantum gravity based on performing a discrete path integral over 
	triangulated geometries. The results of these studies support the existence
	 of a continuum limit for these models.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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