S. Dusuel, J. Vidal
Published 2004-08-30, updated 2004-12-01Version 2
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.
Comments: 4 pages, published version
Journal: Phys. Rev. Lett. 93, 237204 (2004)
Continuous unitary transformations and finite-size scaling exponents in the Lipkin-Meshkov-Glick model
Finite-size scaling exponents in the interacting boson model
The Thermodynamical Limit of the Lipkin-Meshkov-Glick Model
