c = 1 string theory as a topological G/G model

O. Aharony*, O. Ganor, J. Sonnenschein, S. Yankielowicz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The physical states on the free field Fock space of the SL(2, R)/SL(2, R) model at any level are computed. Using a similarity transformation on QBRST, the cohomology of the latter is mapped into a direct sum of simpler cohomologies. We show a one to one correspondence between the states of the k = -1 model and those of the c = 1 string model. A full equivalence between the SL(2, R)/SL(2, R) and SL(2, R)/U(1) models at the level of their Fock space cohomologies is found.

Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalPhysics Letters B
Issue number1-2
StatePublished - 6 May 1993


FundersFunder number
US-Israel Binational Science Foundation
Israel Academy of Sciences and Humanities


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