@article{10272/5465,
year = {2003},
month = {10},
url = {http://hdl.handle.net/10272/5465},
abstract = {We study the quantum phase transition mechanisms that arise in the Interacting Boson Model.
We show that the second-order nature of the phase transition from U(5) to O(6) may be attributed
to quantum integrability, whereas all the first-order phase transitions of the model are due to level
repulsion with one singular point of level crossing. We propose a model Hamiltonian with a true
first-order phase transition for finite systems due to level crossings.},
publisher = {American Physical Society},
keywords = {Bosones},
title = {Quantum Phase Transitions in the Interacting Boson Model : Integrability, level repulsion and level crossing},
author = {Arias Carrasco, José Miguel and Dukelsky, J. and García Ramos, José Enrique},
}