2012/09/30 by V. P. Berezovoj, M. I. Konchatnij, A. J. Nurmagambetov
Mathematics · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Hamiltonian (control theory) #Harmonic oscillator #Isospectral #Mathematical physics #Mathematics #Physics #Propagator #Quantum #Quantum chaos and dynamical systems #Quantum dynamics #Quantum mechanics #Quantum optics and atomic interactions #Quantum tunnelling #Wave function #Wave packet #hep-th #quant-ph
paper · pdf · doi:10.1088/1751-8113/46/6/065302
published as J.Phys. A46 (2013) 065302 · Latex, 28 pages, 7 Figs, 2 Tables; minor presentation changes, journal version
openalex publication_date 2013/01/23 · arxiv created 2013/03/04 · arxiv updated 2013/03/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Inspired by new trends in atomtronics, cold atom devices and Bose–Einstein condensate dynamics, we apply a general technique of N = 4 extended supersymmetric quantum mechanics to isospectral Hamiltonians with triple-well potentials, i.e. symmetric and asymmetric. Expressions of quantum-mechanical propagators, which take into account all states of the spectrum, are obtained, within the N = 4 SQM approach, in the closed form. For the initial Hamiltonian of a harmonic oscillator, we obtain the explicit expressions of potentials, wavefunctions and propagators. The obtained results are applied to tunneling dynamics of localized states in triple-well potentials and for studying its features. In particular, we observe a Josephson-type tunneling transition of a wave packet, the effect of its partial trapping and a non-monotonic dependence of tunneling dynamics on the shape of a three-well potential. We investigate, among others, the possibility of controlling tunneling transport by changing parameters of the central well, and we briefly discuss potential applications of this aspect to atomtronic devices.