The paper addresses a subject that is of general interest: the construction of non-trivial solvable superstring models. In addition, it shows a simple way to incorporate vast area of two-dimensional Integrable Models into string theory.

It describes many new exact solutions of string theory. They may be useful for the study of the interplay between the technics used in string theory and those used in integrable systems.

String theory can be viewed as a quantum extension of Einstein gravitational theory. The study of general string models in curved space-time may shed light on important aspects of string dynamics. Mathematically, such string models are highly complicated and difficult to treat. However, the special class of models called "integrable models" allows for an explicit treatment and an explicit solution (e.g., like one can explicitly describe planetary orbits in Newton theory).

I got interested in this research after the work by Maldacena and Maoz (JHEP 0212:046, 2002, e-Print Archive: hep-th/0207284), which deals with the same subject.