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The dynamics of a double-dot charge qubit embedded in a suspended phonon cavity |
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| Authors: | W.-M. Ju K.-D. Zhu P.-H. Huang H. Zheng |
| Affiliation: | (1) Institut f?r Theoretische Festk?rperphysik, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe, Germany;(2) Theoretical Division, Los Alamos National Laboratory, Los Alamos, 87545, NM, USA;(3) Landau Institute for Theoretical Physics, Kosygin st. 2, 119334 Moscow, Russia |
| Abstract: | We theoretically investigate the dynamics of a double dot charge qubit that is embedded inside a suspended semiconductor slab in terms of a perturbation treatment based on a unitary transformation. The phonon-induced decoherence is analyzed in detail after a derivation of 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. |
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