Finite-Size Scaling Exponents of the Lipkin-Meshkov-Glick Model
arXiv:cond-mat/0408624 · doi:10.1103/PhysRevLett.93.237204
Abstract
We study the ground state properties of the critical Lipkin-Meshkov-Glick model. Using the Holstein-Primakoff boson representation, and the continuous unitary transformation technique, we compute explicitly the finite-size scaling exponents for the energy gap, the ground state energy, the magnetization, and the spin-spin correlation functions. Finally, we discuss the behavior of the two-spin entanglement in the vicinity of the phase transition.
4 pages, published version