Single-electron charge qubit in a double quantum dot

Toshimasa Fujisawa, Toshiaki Hayashi, Sung Woo Jung, Yoon Ha Jeong, Yoshiro Hirayama

Research output: Chapter in Book/Report/Conference proceedingChapter

3 Citations (Scopus)


A semiconductor double quantum dot provides a simple artificial two-level system (qubit) that can be manipulated by electronic signals. Full one-qubit operation is demonstrated with a high-speed voltage pulse. In addition, strength of decoherence can be controlled to allow efficient initialization of the qubit. Remaining uncontrolled decoherence is discussed with background charge fluctuations, cotunneling, and electron-phonon coupling. Moreover, charge detection of a double dot is demonstrated with a quantum-point-contact charge detector.

Original languageEnglish
Title of host publicationQuantum Computing in Solid State Systems
PublisherSpringer New York
Number of pages9
ISBN (Print)0387263322, 9780387263328
Publication statusPublished - 2006 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'Single-electron charge qubit in a double quantum dot'. Together they form a unique fingerprint.

Cite this