Thirring strings

Abstract

Previously it has been observed that a squeeze transformation modifies the central charge of the Virasoro algebra of closed bosonic strings. Here it is shown that this transformation maps a free bosonic string to a string based on the massless Thirring model. Diagonalization of the mass operator of the Thirring string redefines the central charge back to its canonical value, and the squeeze parameter assumes the role of the compactification radius of a bosonic coordinate of the string.