Dissipative dynamics of coupled quantum dots under quantum measurement

Shi Hua Ouyang, Chi Hang Lam, J. Q. You

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

We have studied the dissipative dynamics of a solid-state qubit with an extra electron confined to either one of two coupled quantum dots. Previous theoretical work based on Bloch-type rate equations gave an unphysical uniform occupation probability of the electron in the quantum dots even for non-identical dots. We show that this is due to neglecting higher-order interactions in the analysis. By including higher-order terms, we obtain expected asymmetric occupation probabilities for non-identical dots. Our work demonstrates that the high-order interaction terms can lead to important qualitative impacts on the operation of the qubit.
Original languageEnglish
Article number010
Pages (from-to)11551-11559
Number of pages9
JournalJournal of Physics Condensed Matter
Volume18
Issue number50
DOIs
Publication statusPublished - 20 Dec 2006

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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