CARBON NANOTUBES FOR BUILDING BLOCKS OF QUANTUM COMPUTING DEVICES

In this paper, we discuss possibilities to use single-wall carbon nanotubes (SWCNTs) as building blocks of quantum computing devices, particularly as quantum bits (qubits). To do this, electron transport properties of SWCNT quantum dots (QDs) are described, with experimental data that show artificial atom behaviors of the QD. It is shown that the SWCNT-QD behaves as a one-dimensional artificial atom with simple shell structures and energy scales associated with the artificial atom in the THz frequency range. The simple artificial atom feature would be useful for spin qubits. Another qubit type with normal materials is a charge qubit consisting of the coupled quantum dots. The experimental effort to fabricate it is also described.