Rotation and phase-shift operations for a charge qubit in a double quantum dot

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

Research output: Contribution to journalConference articlepeer-review

69 Citations (Scopus)


Coherent time evolution of a charge qubit in a semiconductor double quantum dot is demonstrated by means of electrical pulse experiments. The qubit state is manipulated with a rectangular or tailored voltage waveform that controls the energy of the system. The initialization, rotation gate, phase-shift gate, and measurement process are sequencially performed just by changing the voltage in a short time.

Original languageEnglish
Pages (from-to)1046-1052
Number of pages7
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number2-4
Publication statusPublished - 2004 Mar 1
Externally publishedYes
EventProceedings of the Eleventh International Conference on Modulation (MSS11) - Nara, Japan
Duration: 2003 Jul 142003 Jul 18


  • Charge qubit
  • Double quantum dot
  • Two-level system

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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