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30 results on '"Bagchi, Arjun"'

27. GCA in 2d

Author

Bagchi, Arjun, primary, Gopakumar, Rajesh, additional, Mandal, Ipsita, additional, and Miwa, Akitsugu, additional

Published
2010
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30. Tensionless strings from worldsheet symmetries

Author

Shankhadeep Chakrabortty, Pulastya Parekh, Arjun Bagchi, High-Energy Frontier, Massachusetts Institute of Technology. Center for Theoretical Physics, Massachusetts Institute of Technology. Laboratory for Nuclear Science, and Bagchi, Arjun

Subjects
High Energy Physics - Theory, DIMENSIONS, Nuclear and High Energy Physics, Worldsheet, FOS: Physical sciences, Long strings, MASSLESS HIGHER SPINS, Conformal and W Symmetry, String theory, LIMIT, 01 natural sciences, High Energy Physics::Theory, Theoretical physics, Conformal symmetry, 0103 physical sciences, Covariant transformation, 010306 general physics, TEMPERATURE, Quantum, Gauge symmetry, Physics, ASYMPTOTIC SYMMETRIES, 010308 nuclear & particles physics, Bosonic Strings, Bosonic string theory, FIELDS, Bogoliubov transformation, High Energy Physics - Theory (hep-th), HAGEDORN TRANSITION, DECONFINEMENT
Abstract

We revisit the construction of the tensionless limit of closed bosonic string theory in the covariant formulation in the light of Galilean conformal symmetry that rises as the residual gauge symmetry on the tensionless worldsheet. We relate the analysis of the fundamentally tensionless theory to the tensionless limit that is viewed as a contraction of worldsheet coordinates. Analysis of the quantum regime uncovers interesting physics. The degrees of freedom that appear in the tensionless string are fundamentally different from the usual string states. Through a Bogoliubov transformation on the worldsheet, we link the tensionless vacuum to the usual tensile vacuum. As an application, we show that our analysis can be used to understand physics of strings at very high temperatures and propose that these new degrees of freedom are naturally connected with the long-string picture of the Hagedorn phase of free string theory. We also show that tensionless closed strings behave like open strings., Fulbright U.S. Student Program

Published
2016
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