Coherent charge oscillation in a semiconductor double quantum dot

Toshiaki Hayashi, Toshimasa Fujisawa, H. D. Cheong, Y. H. Jeong, Y. Hirayama

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The time evolution of a pulse-excited charge qubit in a semiconductor double quantum dot is investigated. All-electrical initialization and coherent gate control of the system are achieved, and coherent charge oscillation is observed through the transport measurements. The oscillation frequency and decoherence time T2 are estimated by fitting the transport data with a simple model. Possible decoherence mechanisms in a charge qubit system are pointed out and discussed in detail.

Original languageEnglish
Pages (from-to)300-303
Number of pages4
JournalIEEE Transactions on Nanotechnology
Issue number2
Publication statusPublished - 2004 Jun
Externally publishedYes


  • Charge qubit
  • Decoherence
  • Double quantum dot (QD)

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering


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