Journal of Computational Electronics

, Volume 3, Issue 3–4, pp 367–371 | Cite as

Modelling of Quantum Electromechanical Systems

  • Antti-Pekka Jauho
  • Tomáš Novotný
  • Andrea Donarini
  • Christian Flindt
Article

Abstract

We discuss methods for numerically solving the generalized Master equation GME which governs the time-evolution of the reduced density matrix ρ of a mechanically movable mesoscopic device in a dissipative environment. As a specific example, we consider the quantum shuttle—a generic quantum nanoelectromechanical system (NEMS). When expressed in the oscillator basis, the stationary limit of the GME becomes a large linear non-sparse matrix problem (characteristic size larger than 104× 104) which however, as we show, can be treated using the Arnoldi iteration scheme. The numerical results are interpreted with the help of Wigner functions, and we compute the current and the noise in a few representative cases.

Keywords

SET Coulomb blockade nanoelectromechanics noise 

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Copyright information

© Springer Science + Business Media, Inc. 2004

Authors and Affiliations

  • Antti-Pekka Jauho
    • 1
  • Tomáš Novotný
    • 1
  • Andrea Donarini
    • 1
  • Christian Flindt
    • 1
  1. 1.NanoDTU, MIC—Department of Micro and NanotechnologyTechnical University of DenmarkLyngbyDenmark

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