Imperial College London
Alternate

ProfessorArkadyTseytlin

Faculty of Natural Sciences, Department of Physics

Professor of Theoretical Physics
 
 
 
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Contact

 

+44 (0)20 7594 1890a.tseytlin Website

 
 
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Location

 

685Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Borsato:2016:10.1016/j.nuclphysb.2016.02.018,
author = {Borsato, R and Tseytlin, AA and Wulff, L},
doi = {10.1016/j.nuclphysb.2016.02.018},
journal = {Nuclear Physics B},
pages = {264--292},
title = {Supergravity background of lambda-deformed model for AdS(2) x S-2 supercoset},
url = {http://dx.doi.org/10.1016/j.nuclphysb.2016.02.018},
volume = {905},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Starting with the View the MathML source supercoset model corresponding to the AdSn×Sn superstring one can define the λ-model of arXiv:1409.1538 either as a deformation of the View the MathML source gauged WZW model or as an integrable one-parameter generalisation of the non-abelian T-dual of the AdSn×Sn superstring sigma model with respect to the whole supergroup View the MathML source. Here we consider the case of n=2 and find the explicit form of the 4d target space background for the λ  -model for the PSU(1,1|2)/SO(1,1)×SO(2) supercoset. We show that this background represents a solution of type IIB 10d supergravity compactified on a 6-torus with only metric, dilaton Φ and the RR 5-form (represented by a 2-form F in 4d) being non-trivial. This implies that the λ-model is Weyl invariant at the quantum level and thus defines a consistent superstring sigma model. The supergravity solution we find is different from the one in arXiv:1410.1886 which should correspond to a version of the λ  -model where only the bosonic subgroup of View the MathML source is gauged. Still, the two solutions have equivalent scaling limit of arXiv:1504.07213 leading to the isometric background for the metric and eΦF which is related to the η  -deformed AdS2×S2 sigma model of arXiv:1309.5850. Similar results are expected in the AdS3×S3 and AdS5×S5 cases.
AU  - Borsato,R
AU  - Tseytlin,AA
AU  - Wulff,L
DO  - 10.1016/j.nuclphysb.2016.02.018
EP  - 292
PY  - 2016///
SN  - 0550-3213
SP  - 264
TI  - Supergravity background of lambda-deformed model for AdS(2) x S-2 supercoset
T2  - Nuclear Physics B
UR  - http://dx.doi.org/10.1016/j.nuclphysb.2016.02.018
UR  - http://hdl.handle.net/10044/1/38573
VL  - 905
ER  -
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