2010/05/21 by Zhenglu Duan, Bixuan Fan, Chun-Hua Yuan +4
Physics and Astronomy · #Atomic physics #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Feshbach resonance #Laser #Matter wave #Molecule #Nonlinear system #Physics #Quantum #Quantum mechanics #Quantum optics and atomic interactions #Quantum tunnelling #Rectangular potential barrier #Resonance (particle physics) #Scanning tunneling spectroscopy #Strong Light-Matter Interactions #Wave packet #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physreva.81.055602
published as Phys. Rev. A 81, 055602 (2010) · 4 pages, 5 figures
openalex publication_date 2010/05/21 · arxiv created 2010/06/01 · arxiv updated 2015/05/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We theoretically study the effect of atomic nonlinearity on the tunneling time in the case of an atomic Bose-Einstein condensate (BEC) traversing the laser-induced potential barrier. The atomic nonlinearity is controlled to appear only in the region of the barrier by employing the Feshbach resonance technique to tune interatomic interaction in the tunneling process. Numerical simulation shows that the atomic nonlinear effect dramatically changes the tunneling behavior of the BEC matter wave packet and results in the violation of the Hartman effect and the occurrence of negative tunneling time.