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SUMMARY:Sucheta Majumdar (Université Libre de Bruxelles)
DTSTART:20210422T143000Z
DTEND:20210422T153000Z
DTSTAMP:20260423T041622Z
UID:HEPTUW/22
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HEPTUW/22/">
 BMS symmetry in light-cone gravity</a>\nby Sucheta Majumdar (Université L
 ibre de Bruxelles) as part of HEP seminars TU Wien (Vienna)\n\n\nAbstract\
 nThe aim of this talk is to discuss how the BMS symmetry appears in gravit
 y in the light-cone gauge\, a formulation where all unphysical degrees of 
 freedom are integrated out. By checking the invariance of\nthe light-cone 
 Hamiltonian\, we obtain a set of residual gauge transformations that satis
 fy the BMS algebra realized on the two physical fields in the theory. Henc
 e\, the BMS algebra appears as a consequence of residual gauge invariance 
 in the bulk without any reference to asymptotic limits. Alternatively\, on
 e can also obtain the\nBMS algebra as a local extension of the Poincaré s
 ymmetry in light-cone gravity in four dimensions. In the light-cone formal
 ism\, the dynamical part of the Poincaré algebra is enhanced to accommoda
 te the supertranslations\, yielding the infinite-dimensional BMS algebra.\
 n
LOCATION:https://researchseminars.org/talk/HEPTUW/22/
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