The Classical Sine Gordon Theory

摘要: The organizing committee of this school had invited Ludwig Fadeev as one the lecturers for tutorials. Unfortunately, was prevented from coming. Thus I asked to step into his place. do not know programme which planned follow. Since in seminars by M. Luscher, A. Luther, and Neveu quantum sine Gordon theory (or, equivalently, massive Thirring model) will play a central role, finally decided give an introduction classical theory. instructs us about elementary excitations system is capable. Moreover, it provides variety explicit analytic results used WKB approximation mass spectrum corresponding