We show that a two-atom Bose–Hubbard model exhibits three different phases in the behavior of thermal entanglement in its parameter space. These phases are demonstrated to be traceable back to the existence of level crossings in the ground state of the same system. Significant similarities between the behaviors of thermal entanglement and heat capacity in the parameter space are brought to light thus allowing to interpret the occurrence and the meaning of all these three phases.

Leggio, B., Napoli, A., Messina, A. (2012). Entanglement and heat capacity in a two-atom Bose–Hubbard model. PHYSICS LETTERS A, 376(4), 339-343 [10.1016/j.physleta.2011.10.075].

Entanglement and heat capacity in a two-atom Bose–Hubbard model

LEGGIO, Bruno;NAPOLI, Anna;MESSINA, Antonino
2012-01-01

Abstract

We show that a two-atom Bose–Hubbard model exhibits three different phases in the behavior of thermal entanglement in its parameter space. These phases are demonstrated to be traceable back to the existence of level crossings in the ground state of the same system. Significant similarities between the behaviors of thermal entanglement and heat capacity in the parameter space are brought to light thus allowing to interpret the occurrence and the meaning of all these three phases.
Leggio, B., Napoli, A., Messina, A. (2012). Entanglement and heat capacity in a two-atom Bose–Hubbard model. PHYSICS LETTERS A, 376(4), 339-343 [10.1016/j.physleta.2011.10.075].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/64975
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