Two-mode dipolar bosonic junctions
Dipartimento di Fisica e Astronomia “Galileo Galilei” and CNISM, Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia (CNISM), Università di Padova, via Marzolo 8, 35131 Padova, Italy
Revised: 15 January 2013
Published online: 11 March 2013
We consider a two-mode atomic Josephson junction realized with dilute dipolar bosons confined by a double-well. We employ the two-site extended Bose-Hubbard Hamiltonian and characterize the ground-state of this system by the Fisher information, coherence visibility, and entanglement entropy. These quantities are studied as functions of the interaction between bosons in different wells. The emergence of Schrödinger's cat-like state with a loss of coherence is also commented.
© EDP Sciences, Springer-Verlag, 2013