Decoherence of a charge qubit embedded inside a suspended phonon cavity

Y. Y. Liao*, Y. N. Chen, Wu-Ching Chou, D. S. Chuu

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

This study elucidates the theory of phonon-induced decoherence of a double dot charge qubit that is embedded inside a suspended semiconductor slab. The influences of the lattice temperature, width of the slab, and positions of the dots on the decoherence are analyzed. Numerical results indicate that the decoherence in the slab system is weaker than that in a bulk environment. In particular, the decoherence is markedly suppressed by the inhibition of the electron-phonon coupling. Such a system with low decoherence may be useful for manipulating the qubits.

Original languageEnglish
Article number033303
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number3
DOIs
StatePublished - 14 Jan 2008

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