Field Theory Duals from (non)-critical Type 0 Strings

We review some aspects of Polyakov’s proposal for constructing nonsupersymmetric field theories from non-critical Type 0 string theory. Getting some insight into nonsupersymmetric field theory via AdS/CFT approach is a difficult task to achieve. There are different proposals to address this issue, dealing with possible mechanisms to break supersymmetry. Polyakov in [1] has proposed considering a nonsupersymmetric string theory with non-chiral GSO projection, known as Type 0 [2, 3]. This proposal was elaborated further in a series of papers starting from [4]. In this short note we present the results obtained in [5, 6]. Type 0 string theories are purely bosonic strings with modular invariant partition function and four sectors whose low laying fields are here summarized1 (NS+, NS+) (NS−, NS−) (R+, R∓) (R−, R±) 0A Φ, Bμν , gμν T A (1) μ A (1) μνρ A (2) μ A (2) μνρ 0B Φ, Bμν , gμν T A (1)A (1) μνA (+) μνρσ A(2)A (2) μνA (−) μνρσ There is a corresponding doubled set of D-branes coupling to RR-fields. Preprint SISSA 110/99/EP. Talk presented at the NATO-ASI and TMR Summer School ’Progress in String Theory and M-Theory’ Cargese, May 24 June 5, 1999. The two entries in parenthesis refer respectively to left and right movers and the signs correspond to the choice of GSO projection. The upper (lower) signs in the RR sectors define Type 0A (0B) theory. 1