BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Love and Naturalness  - Mikhail Ivanov (NYU)
DTSTART:20210614T140000Z
DTEND:20210614T150000Z
UID:TALK160231@talks.cam.ac.uk
CONTACT:James Bonifacio
DESCRIPTION:Tidal deformability coefficients (“Love numbers”) are key 
 parameters of compact objects\, which can be probed with gravitational wav
 e measurements. Also they are Wilson coefficients of the effective field t
 heory (EFT) of inspiraling binaries. Remarkably\, black hole Love numbers 
 vanish identically in general relativity in four dimensions\, which repres
 ents a major naturalness problem in the EFT context. In my talk\, I will p
 resent a new hidden SL(2\,R)xU(1) symmetry of general relativity (“Love 
 symmetry”)\, which elegantly resolves the naturalness paradox. In partic
 ular\, I will demonstrate that all known properties of black hole tidal Lo
 ve numbers follow from the SL(2\,R) representation theory. Finally\, I wil
 l discuss implications of the Love symmetry for gravitational wave science
  and its relation to near-horizon isometries of extremal black holes.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
END:VEVENT
END:VCALENDAR