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SUMMARY:Efficiency=Geometry? Decoding the DNA of prediction in gauge\, gra
 vity\, and effective field theories. - John Joseph  Carrasco (CEA/Saclay)
DTSTART:20160629T150000Z
DTEND:20160629T160000Z
UID:TALK66617@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:One can easily be frustrated by the tremendous redundancy in p
 ossible physical description. &nbsp\;By this I mean the ability to choose 
 a gauge\, make field redefinitions\, add any amount of auxiliary spectator
  matter\, and the such. &nbsp\;Happily we can exploit such freedom to enco
 urage the emergence of a new duality in gauge theories. The existence of a
  duality between color and kinematics exposes a hidden local double-copy s
 tructure inherent to prediction in many theories. &nbsp\;This structure we
 aves its way between theories both formal and phenomenological\, from QCD 
 to Gravity\, from Chiral Perturbation Theory to Born-Infeld\, and from ope
 n to closed superstring theories. The duality is sharpest at the level of 
 the perturbative S-matrix &mdash\; so I will focus my talk there\, althoug
 h I will also mention some recent provocative work beyond scattering. &nbs
 p\;I will mainly discuss challenges to generically achieving color-dual ki
 nematic representations at the multi-loop&nbsp\;level. I present a path fo
 rward that introduces\, at least temporarily\, a redundancy of description
  that we can exploit to map a set of functional relations to linear ones. 
 &nbsp\;I will talk about this approach in terms of a geometric picture inv
 olving the graph of local graphs\, discussing tradeoffs and applicability 
 to long-standing problems.<br>
LOCATION:Seminar Room 1\, Newton Institute
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