*Tomoki Yamaguchi1, Satoshi Ejima2, Fabian H. L. Essler3, Florian Lange2, Holger Fehske2, Yukinori Ohta1
(1. Chiba Univeristy(Japan), 2. University of Greifswald(Germany), 3. Oxford University(UK))
Keywords:Quantum spin systems, One dimensional system