2005/09/22 by Guan-Fang Wang, Guanfang Wang, Libin Fu +2 · 3 citations
Chemistry · Mathematics · Physics and Astronomy · #Bose–Einstein condensate #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Mathematics #Modulation (music) #Nonlinear system #Oscillation (cell signaling) #Parameter space #Phase transition #Physics #Quantum #Quantum mechanics #Quantum tunnelling #Quantum, superfluid, helium dynamics #Realization (probability) #Resonance (particle physics) #Spectroscopy and Laser Applications #Trapping #cond-mat.mes-hall
paper · pdf · doi:10.1103/physreva.73.013619
published as Phys. Rev A 73, 013619 (2006) · 7 pages, 11 figures
arxiv created 2005/09/22 · openalex publication_date 2006/01/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
With phase space analysis approach, we investigate the self-trapping phenomenon for two weakly coupled Bose-Einstein condensates (BECs) in a symmetric double well potential. We identify two kinds of self-trapping by their different relative phase behavior. By applying a periodic modulation on the energy bias of the system we find that the self-trapping can be controlled, in other words, the transition parameters can be adjusted effectively by the periodic modulation. Analytic expressions for the dependence of the transition parameters on the modulation parameters are derived for high- and low-frequency modulations. For an intermediate-frequency modulation, we find the resonance between the periodic modulation and nonlinear Rabi oscillation dramatically affect the tunneling dynamics and demonstrate many phenomena. Finally, we study the effects of many-body quantum fluctuation on the self-trapping and discuss the possible experimental realization.