Coherent destruction of tunneling in waveguide directional couplers (4 pages)

Shi Jian, Rui-Qiong Ma, Zuoliang Duan +3 more

Jonathan C. F. Matthews

Stefano Longhi

It is theoretically shown that the phenomenon of coherent destruction of tunneling in bistable quantum systems induced by an external driving field can be realized in a periodically curved optical waveguide coupler, the periodic bending of the coupler simulating the effect of the external field in the quantum system.

Shi Jian, Rui-Qiong Ma, Lin Liu

We propose a nonadiabatic tunneling technique, which is different from the stimulated Raman adiabatic passage, to improve the optical tunneling efficiency of a three-waveguide system. The theoretical calculations and results show that the tunneling efficiency can reach 100%. The exact analytic solutions to the nonadiabatic tunneling dynamics are presented. Light dynamics in the optical coupler enable a direct visualization of the population transfer of atomic system under generalized π pulses technique.

Rafael Julius, Abdel-Baset M.A. Ibrahim, Mohd Kamil Abd-Rahman +1 more

Stefano Longhi

An optical realization of the phenomenon of many-body coherent destruction of tunneling, recently predicted for interacting many-boson systems by Gong, Molina, and H\"anggi [Phys. Rev. Lett. 103, 133002 (2009)], is proposed for light transport in engineered waveguide arrays. The optical system enables a direct visualization in Fock space of the many-body tunneling control process.