Ground-state and dynamical properties of a spin-S Heisenberg star

• Published in: Communications in theoretical physics Vol. 74; no. 8; pp. 85701 - 85711
• Main Authors: Li, Jiaxiu, Wu, Ning
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.08.2022
• Subjects: antiferromagnetic order relaxation; central spin model; ground state; Heisenberg XXX chain; polarization dynamics

Abstract We generalize the Heisenberg star consisting of a spin-1/2 central spin and a homogeneously coupled spin bath modeled by the XXX ring [Richter J and Voigt A 1994 J. Phys. A: Math. Gen. 27 1139-1149] to the case of arbitrary central-spin size S < N /2, where N is the number of bath spins....