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VERSION:2.0
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CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260815T092813Z
LAST-MODIFIED:20170915T134547Z
DTSTART:20171004T194500Z
DTEND:20171004T204500Z
UID:event1785@bu.edu
URL:http://physics.bu.edu/internal/events/show/1785
SUMMARY:"The Born Again Universe"
DESCRIPTION:Featuring David E. Kaplan\, Johns Hopkins University\n\nPart of
	 the HET Seminar Series.\n\nWe present a class of non-singular\, bouncing c
	osmologies which do not rely on unstable\, null energy condition (NEC) viol
	ating fluids. These cosmologies evade singularity theorems through the use 
	of vorticity in compact extra dimensions. The vorticity combats the focusin
	g of geodesics during the contracting phase. The compact extra dimensions r
	ely on stable NEC violating sources such as Casimir energy. The four dimens
	ional effective theory contains an NEC violating fluid of Kaluza-Klein exci
	tations of the higher dimensional metric. These spacetime metrics could pot
	entially allow dynamical relaxation to solve the cosmological constant prob
	lem. These ideas can also be used to support traversable Lorentzian wormhol
	es.
LOCATION:PRB 595\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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