Experimental challenges in qubit specific coupled electron waveguide application

Solid-state based coupled electron waveguide (CEW) is one of the suggested approaches to realize a Qubit for futuristic quantum computing purposes. Its functionality is based on coherent switching and superposition of electron wavefunction over two coupled quantum wires. Conceptually it is the simplest approach (relatively), however there are a multitude of effects which interfere with the actual phenomenon and complicate any experimental analysis. This paper reports on the influence of measurement setup, device structure, and operating region.