Decoherence of a charge qubit embedded inside a suspended phonon cavity

Y. Y. Liao, Y. N. Chen, W. C. Chou, D. S. Chuu

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


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
Issue number3
Publication statusPublished - 2008 Jan 14

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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