Integrable deformations of the non-unitary minimal conformal model M3,5

The scaling region of the non-unitary minimal conformal model M3,5 is described by three different integrable massive field theories. We propose the scattering theory for the integrable deformation of M3,5 by the field ψ with anomalous dimensions (3/4, 3/4). The spectrum of this theory is confirmed by the Truncation Conformal Space Approach. We also consider the thermodynamics of the one-dimensional quantum system defined by the transfer matrix relative to the deformation of M3,5 by the field φ with anomalous dimensions (1/5, 1/5). This deformation drives the original conformal model into a region of the phase diagram where there are plasma oscillations. (orig.)