Determinant representation for dynamical correlation functions of the Quantum nonlinear Schrödinger equation

Details Determinant representation for dynamical correlation functions of the Quantum nonlinear Schrödinger equation Determinant representation for dynamical correlation functions of the Quantum nonlinear Schrödinger equation

1996-11-26

arxiv.org/abs/hep-th/9611216v2

Commun.Math.Phys. 188 (1997) 657-689

Physics

High Energy Physics

High Energy Physics - Theory

LaTEX file, 35 pages, to appear in C.M.P. (1997)

Scientific paper

10.1007/s002200050182

The foundation for the theory of correlation functions of exactly solvable models is determinant representation. Determinant representation permit to describe correlation functions by classical completely integrable differential equations [Barough, McCoy, Wu]. In this paper we show that determinant represents works not only for free fermionic models. We obtained determinant representation for the correlation function $<\psi(0,0)\psi^\dagger(x,t)>$ of the quantum nonlinear Schr\"odinger equation, out of free fermionic point. In the forthcoming publications we shall derive completely integrable equation and asymptotic for the quantum correlation function of this model of interacting fermions.

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