Decoherence of a Josephson junction flux qubit

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Abstract

We have investigated decoherence mechanisms in a Josephson-junction flux qubit. Loss of the coherence due to energy relaxation and dephasing was studied by measurements of the time evolution of qubit states subjected to simple control pulse sequences. As a function of qubit bias parameters, the characteristic time scales of the decoherence as well as the decay envelope functions varied, from which information about the fluctuation spectrum of the environment were deduced.

Original languageEnglish
Title of host publicationProceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages54-59
Number of pages6
ISBN (Print)9812568581, 9789812568588
DOIs
StatePublished - 2006
Externally publishedYes

Publication series

NameProceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005

Keywords

  • Decoherence
  • Josephson junction
  • Qubit

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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