On solvable models of type-IIB superstring in NS-NS and R-R plane wave backgrounds
We consider type-IIB string in the two plane-wave backgrounds which may be interpreted as special limits of the AdS3 × S3 supported by the NS-NS or R-R 3-form backgrounds. The NS-NS plane-wave string model is equivalent to a direct generalization of the Nappi-Witten model, with its spectrum being si...
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2002
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10298479_v6_n4_p455_Russo http://hdl.handle.net/20.500.12110/paper_10298479_v6_n4_p455_Russo |
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| Sumario: | We consider type-IIB string in the two plane-wave backgrounds which may be interpreted as special limits of the AdS3 × S3 supported by the NS-NS or R-R 3-form backgrounds. The NS-NS plane-wave string model is equivalent to a direct generalization of the Nappi-Witten model, with its spectrum being similar to that of strings in constant magnetic field. The R-R model can be solved in the light-cone gauge, where the Green-Schwarz world-sheet theory reduces to a system of free fields: 4 massive and 4 massless copies of bosons and fermions. We describe the string spectra of the two models and study the associated asymptotic density of states. We also discuss a more general class of exactly solvable plane-wave models with reduced or completely broken supersymmetry which are obtained by adding twists in two spatial 2-planes. © SISSA/ISAS 2002. |
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