Eur. Phys. J. B 5, 555-557 (1998)
https://doi.org/10.1007/s100510050477

The new identity for the scattering matrix of exactly solvable models^*

¹ ITP, SUNY at Stony Brook, NY 11794-3840, USA
² Steklov Mathematical Institute, Gubkina 8, Moscow 117966, Russia

Corresponding author: ^a korepin@insti.physics.sunysb.edu

Received: 4 December 1997
Accepted: 17 March 1998
Published online: 15 October 1998

Abstract

We discovered a simple quadratic equation, which relates scattering phases of particles on Fermi surface. We consider one-dimensional Bose gas and XXZ Heisenberg quantum spin chain.