Quantum tunneling time of a Bose-Einstein condensate traversing through a laser-induced potential barrier

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.055602· OSTI ID:21408935

Zhenglu, Duan; Bixuan, Fan; Chunhua, Yuan; Weiping, Zhang ^[1]; Jing, Cheng ^[2]; Shiyao, Zhu ^[3]

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1. State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062 (China)
2. Department of Physics, South China University of Technology, Guangzhou 510640 (China)
3. Department of Physics, Hong Kong Baptist University, Kowloon Tong (Hong Kong)

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.

• OSTI ID: 21408935
• Journal Information: Physical Review. A, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevA.81.055602; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
COMPUTERIZED SIMULATION
INTERACTIONS
LASERS
MATTER
NONLINEAR PROBLEMS
POTENTIALS
RESONANCE
TUNNEL EFFECT
TUNNELING
WAVE PACKETS
SIMULATION