Exact Overlaps for All Integrable Matrix Product States of Rational Spin Chains

Author(s): Tamas Gombor The overlaps between integrable matrix product states (MPSs) and Bethe states are important in both the nonequilibrium statistical physics and the AdS/CFT duality. We present the general MPS overlap formula. The result is a product of a ratio of Gaudin determinants and a prefactor. The Gaudin determ… [Phys. Rev. Lett. 135, 150402] Published Thu Oct 09, 2025