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DTSTAMP:20260915T200534Z
LAST-MODIFIED:20161101T145204Z
DTSTART:20161102T201500Z
DTEND:20161102T211500Z
UID:event1657@bu.edu
URL:http://physics.bu.edu/internal/events/show/1657
SUMMARY:Holography and Scattering Amplitudes
DESCRIPTION:Featuring Cliff Cheung\, Caltech\n\nPart of the HET Seminar Ser
	ies.\n\nWe recast 4D scattering amplitudes and their soft limits as correla
	tors of a 2D CFT on the celestial sphere.  Our construction relies on a fol
	iation of 4D flat space into a family of 3D hyperbolic geometries to which 
	the AdS3/CFT2 dictionary is directly applicable.  By reformulating 4D scatt
	ering amplitudes as 3D Witten diagrams dual to 2D correlators\, we show how
	 the Ward identities of the 2D CFT are equivalent to the 4D soft theorems. 
	 Moreover\, we demonstrate how the infinite-dimensional Kac-Moody and Viras
	oro algebras of the 2D CFT are manifested as the asymptotic symmetries of 4
	D flat space.  Finally\, we discuss the interpretation of 4D electromagneti
	c and gravitational memory effects as a certain version of the 3D Aharonov-
	Bohm effect.
LOCATION:PRB 565\, 3 Cummington Mall\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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