Controlled decoherence of a charge qublt in a double quantum dot

Toshimasa Fujisawa, Toshiaki Hayashi, Yoshiro Hirayama

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The controlled decoherence of a charge qubit in a double quantum dot (DQD) was investigated. The energy bias and strength of the decoherence of the system were controlled with a high speed voltage pulse. The dissipative tunneling processes in the single-electron tunneling regime strongly affected the qubit, which was effectively isolated from the electrodes in the Coulomb blockade regime. Density matrix simulations were used to analyze the controlled decoherence of the charge qubit.

Original languageEnglish
Pages (from-to)2035-2038
Number of pages4
JournalJournal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Issue number4
Publication statusPublished - 2004 Jul
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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