Nonadiabatic electron manipulation in quantum dot arrays

Keiji Saito, Yosuke Kayanuma

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


A method of coherent manipulation of the electron tunneling in quantum dots is proposed, which utilizes the quantum interference in nonadiabatic double crossing of the discrete energy levels. In this method, we need only a smoothly varying gate voltage to manipulate electrons, without a sudden switching on and off. A systematic design of a smooth gate pulse is presented with a simple analytic formula to drive the two-level electronic state to essentially an arbitrary target state, and numerical simulations for complete transfer of an electron is shown for coupled double quantum dots and an array of quantum dots. Estimation of the manipulation time shows that the present method can be employed in realistic quantum dots.

Original languageEnglish
Article number201304
Pages (from-to)201304-1-201304-4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number20
Publication statusPublished - 2004 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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