Abstract
The homogeneous inviscid Burgers equation, which determines the spectrum of a \(T\overline T \) deformed model, has a natural interpretation as the condition of the gauge invariance of the target space-time energy and momentum of a (non-critical) string theory quantised in a generalised uniform light-cone gauge which depends on the deformation parameter. As a simple application of the light-cone gauge interpretation, we derive the \(T\overline T \) deformed Lagrangian for a system of any number of scalars, fermions and chiral bosons with an arbitrary potential. We find that the \(T\overline T \) deformation is driven by the canonical Noether stress-energy tensor but not the covariant one.
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Acknowledgments
I would like to thank Tristan McLoughlin and Alessandro Sfondrini for fruitful discussions, and Alessandro Sfondrini for useful comments on the manuscript.
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To Andrei Alekseevich Slavnov, the best supervisor one can hope for, on the occasion of his 80th birthday
Published in Russian in Trudy Matematicheskogo Instituta imeni V.A. Steklova, 2020, Vol. 309, pp. 120–140.
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Frolov, S.A. \(T\overline T \) Deformation and the Light-Cone Gauge. Proc. Steklov Inst. Math. 309, 107–126 (2020). https://doi.org/10.1134/S0081543820030098
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DOI: https://doi.org/10.1134/S0081543820030098