Volume 124, Number 3, November 2018
|Number of page(s)||7|
|Published online||03 December 2018|
Dynamics of interacting bosons in a double-well potential
1 Department of Physics, Indian Institute of Technology - Guwahati, Assam, India
2 Department of Physics, Indian Institute of Technology - Kanpur, India
Received: 29 June 2018
Accepted: 26 October 2018
We present effects of an external driving on the tunneling dynamics of interacting bosons confined in a double-well potential. At large values of a periodic driving potential, the dynamics become chaotic, with a distinct difference between tuning of the amplitude or the phase of the driving term with regard to the route leading to chaos. For example, we find that a controlled increase in the amplitude of the driving term with a fixed phase leads to quasiperiodic route to chaos. While tuning of the frequency with a fixed (large) amplitude leads to a crisis-induced intermittency route to a chaotic dynamics, where the system intermittently visits different attractors in the phase space. Surprisingly, a chirp frequency superposed on a harmonic signal suppresses the chaotic motion, thereby yielding an orderly dynamics, pretty similar to a (damped) Rabi oscillation.
PACS: 03.75.Lm – Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations / 05.45.-a – Nonlinear dynamics and chaos
© EPLA, 2018
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