Quantum electronic devices and circuits based on InGaAs/InP ridge structures achieved via CBE nano-template technology

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It was 25 years ago when R. Feynman published his inspiring paper about quantum computers. At that time it was just an intriguing idea - far from any experimental implementation. Since then a remarkable progress has been made, which can be seen for example in today's computer technology. Thanks to continuous miniaturization of microelectronic circuits, sizes of elements have already reached sub-micrometer scale and according to general tendency in next 10 years the microelectronics on-chip components will reach tens of nanometers scale. At this size the physical description changes from classical to quantum physics laws. It is envisioned that future electronic circuits will consist of quantum dots connected with quantum wires. Due to these revolutionary changes of the paradigm not only does it change the principles of operation but also offers new practical opportunities. The most challenging of them is quantum computer, which is theoretically predicted to be superior to classical one for solving certain problems such as secure encryption, factoring of large numbers, data base search, and others.