Quantum Phase Transitions in the Interacting Boson Model : Integrability, level repulsion and level crossing

Arias Carrasco, José Miguel; Dukelsky, J.; García Ramos, José Enrique

Author

Arias Carrasco, José Miguel; Dukelsky, J.; García Ramos, José Enrique
Publication Date

2003-10-14
Publisher

American Physical Society
Citation

Arias Carrasco, J.M., Dukelsky, J., García Ramos, J.E. : "Quantum Phase Transitions in the Interacting Boson Model: Integrability, level repulsion and level crossing". Physical Review Letters. Vol. 91, n. 16 (2003). ISSN 0031-9007
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.
URI

http://hdl.handle.net/10272/5465

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Quantum Phase Transitions in the Interacting Boson Model : Integrability, level repulsion and level crossing

Author

Arias Carrasco, José Miguel; Dukelsky, J.; García Ramos, José Enrique UHU Authority

Publication Date

2003-10-14

Publisher

American Physical Society

Citation

Arias Carrasco, J.M., Dukelsky, J., García Ramos, J.E. : "Quantum Phase Transitions in the Interacting Boson Model: Integrability, level repulsion and level crossing". Physical Review Letters. Vol. 91, n. 16 (2003). ISSN 0031-9007

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.

URI

http://hdl.handle.net/10272/5465

Fichero	Tamaño	Formato	Ver	Description
Quantum_phase_ transitions.pdf	180.8Kb	PDF	View/Open	preprint version

Fichero	Tamaño	Formato	Ver	Description
Quantum_phase_ transitions.pdf	180.8Kb	PDF	View/Open	preprint version

This item appears in the following Collection(s)

DFA - Artículos