Condensing momentum modes in 2-d 0A string theory with flux

We use a combination of conformal perturbation theory techniques and matrix model results to study the effects of perturbing by momentum modes two dimensional type 0A strings with non-vanishing Ramond-Ramond (RR) flux. In the limit of large RR flux (equivalently, μ = 0) we find an explicit analytic form of the genus zero partition function in terms of the RR flux q and the momentum modes coupling constant α. The analyticity of the partition function enables us to go beyond the perturbative regime and, for α >> q, obtain the partition function in a background corresponding to the momentum modes condensation. For momenta such that 0 < p < 2 we find no obstruction to condensing the momentum modes in the phase diagram of the partition function.