Tensionless strings from worldsheet symmetries
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13130_2016_Article_3020.pdf
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Author(s)
Bagchi, Arjun
Chakrabortty, Shankhadeep
Parekh, Pulastya
Date Issued
January 2016
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Bagchi, Arjun, Shankhadeep Chakrabortty, and Pulastya Parekh. “Tensionless Strings from Worldsheet Symmetries.” Journal of High Energy Physics 2016.1 (2016): n. pag.
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1007/JHEP01(2016)158
