6533b853fe1ef96bd12ac1ca

RESEARCH PRODUCT

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

Bruno LeggioAnna NapoliAntonino Messina

subject

PhysicsThermal entanglementCondensed matter physicsQuantum mechanicsAtomGeneral Physics and AstronomyEntanglement Heat Capacity Bose-Hubbard Model critical pointsQuantum entanglementParameter spaceBose–Hubbard modelSquashed entanglementGround stateHeat capacity

description

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.

yearjournalcountryeditionlanguage
2012-01-01
10.1016/j.physleta.2011.10.075http://hdl.handle.net/10447/64975