2006/08/28 by A. N. Salgueiro, A. F. R. de Toledo Piza, Gabriela Barreto Lemos +6
Physics and Astronomy · #Amplitude #Boson #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Degenerate energy levels #Josephson effect #Physics #Population #Quantum #Quantum electrodynamics #Quantum mechanics #Quantum optics and atomic interactions #Quantum tunnelling #Quantum, superfluid, helium dynamics #Superconductivity #Trapping #quant-ph
paper · pdf · doi:10.1140/epjd/e2007-00224-4
published as Eur. Phys. J. D 44 3 (2007) 537-540
arxiv created 2006/08/28 · openalex publication_date 2007/06/28 · arxiv updated 2010/11/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The dynamics of the population imbalance of bosons in a double-well potential is investigated from the point of view of many-body quantum mechanics in the framework of the two-mode model. For small initial population imbalances, coherent superpositions of almost equally spaced energy eigenstates lead to Josephson oscillations. The suppression of tunneling at population imbalance beyond a critical value is related to a high concentration of initial state population in the region of the energy spectrum with quasi-degenerate doublets resulting in imbalance oscillations with a very small amplitude. For unaccessible long times, however, the system recovers the regime of Josephson oscillations.