Abstract
We propose a novel quantum device in which a double carbon nanotube is embedded inside a suspended semiconductor slab. We theoretically investigate, in terms of a perturbation treatment based on a unitary transformation, the dynamics of the charge qubit in relation to the device. The phonon-induced decoherence and the quality of the qubit are analyzed in detail after a derivation of the phonon spectral density. It is shown that a charge qubit of high quality can be obtained due to the inhibition of the electron–phonon coupling in the confined structure of the slab, suggesting that the novel quantum device is a good candidate for quantum information processing.
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Wang, H., Li, JJ., Ju, WM. et al. The dynamics of a double carbon nanotube charge qubit embedded in a suspended phonon cavity. Appl. Phys. B 101, 593–599 (2010). https://doi.org/10.1007/s00340-010-4269-2
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DOI: https://doi.org/10.1007/s00340-010-4269-2