Shortcut to adiabatic passage in a waveguide coupler with a complex-hyperbolic-secant scheme
Koushik Paul, Amarendra K. Sarma · Physical Review A · 2015
We propose a directional coupler exploiting the framework of adiabatic passage for two-level atomic systems with a configuration-dependent complex-hyperbolic-secant scheme. A recently developed Shortcut to Adiabatic passage method (STA), which uses a transitionless quantum driving algorithm, is applied to the coupler. The study shows that it is possible to reduce the device length significantly using STA, keeping the efficiency of power transfer at 100%. This shortcut approach shows much superiority in terms of robustness and fidelity in power switching compared to the adiabatic approach.