Scientific Results

Spontaneous symmetry breaking and collapse in bosonic Josephson junctions

Year: 2010

Authors: Mazzarella G., Salasnich L.

Autors Affiliation: Dipartimento di Fisica “Galileo Galilei” and Consorzio Nazionale nteruniversitatio per le Scienze Fisiche della Materia (CNISM),Università di Padova, Via Marzolo 8, I-35122 Padova, Italy; CNR – Istituto Nazionale di Ottica Research Unit at Padova, Via Marzolo 8, I-35122 Padova, Italy; Center for Applied Mathematics and Theoretical Physics, University of Maribor, Krekova 2, SI-2000 Maribor, Slovenia

Abstract: We investigate an attractive atomic Bose-Einstein condensate (BEC) trapped by a double-well potential in the axial direction and by a harmonic potential in the transverse directions. We obtain numerically a quantum phase diagram which includes all the three relevant phases of the system: Josephson, spontaneous symmetry breaking (SSB), and collapse. We consider also the coherent dynamics of the BEC and calculate the frequency of population-imbalance mode in the Josephson phase and in the SSB phase up to the collapse. We show that these phases can be observed by using ultracold vapors of (7)Li atoms in a magneto-optical trap.


Volume: 82 (3)      Pages from: 033611  to: 033611

KeyWords: bec
DOI: 10.1103/PhysRevA.82.033611

Citations: 10
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