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Please use this identifier to cite or link to this item: http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/15305
Title: Boosting to BMS
Authors: Banerjee, Aritra
Keywords: Physics
Bondi-Metzner-Sachs (BMS)
Conformal Carroll symmetries
Issue Date: Sep-2022
Publisher: Springer
Abstract: Bondi-Metzner-Sachs (BMS) symmetries, or equivalently Conformal Carroll symmetries, are intrinsically associated to null manifolds and in two dimensions can be obtained as an Inönü-Wigner contraction of the two-dimensional (2d) relativistic conformal algebra. Instead of performing contractions, we demonstrate in this paper how this transmutation of symmetries can be achieved by infinite boosts or degenerate linear transformations on coordinates. Taking explicit cues from the worldsheet theory of null strings, we show boosting the system is equivalent to adding a current-current deformation term to the Hamiltonian. As the strength of this deformation term reaches a critical value, the classical symmetry algebra “flows” from two copies of Virasoro to the BMS algebra. We further explore the situation where the CFT coordinates are asymmetrically transformed, and degenerate limits lead to chiral theories.
URI: https://link.springer.com/article/10.1007/JHEP09(2022)251
http://dspace.bits-pilani.ac.in:8080/jspui/xmlui/handle/123456789/15305
Appears in Collections:Department of Physics

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