Low Temperature Decoherence and Relaxation in Charge Josephson Junction Qubits

Alex Grishin, Igor V. Yurkevich, Igor V. Lerner

Research output: Chapter in Book/Report/Conference proceedingChapter


Research interest in controllable two-level systems, which have been enthusiastically called quantum bits or qubits, has grown enormously during the last decade. Behind a huge burst of activity in this field stands an idea of what is possible in principle but extremely difficult to achieve instrumentally - the fascinating idea of quantum computing. The very principle of quantum superposition allows many operations to be performed on a quantum computer in parallel, while an ordinary ‘classical’ computer, however fast, can only handle one operation at a time. The enthusiasm is not held back by the fact that exploiting quantum parallelism is by no means straightforward, and there exist only a few algorithms (e.g., [1, 2]) for which the quantum computer (if ever built) would offer an essential improvement in comparison with its ‘classical’ counterpart. Even if other uses of quantum computing prove limited (which might or might not be the case), its existence would most certainly lead to a breakthrough in simulations of real physical many-particle systems.

Original languageEnglish
Title of host publicationSpringer Series in Solid-State Sciences
Number of pages25
Publication statusPublished - 2007

Publication series

NameSpringer Series in Solid-State Sciences
ISSN (Print)0171-1873
ISSN (Electronic)2197-4179

Bibliographical note

Funding Information:
We thank B. L. Altshuler, Y. M. Galperin, R. Fazio and A. Shnirman for useful comments. One of us (I.V.L.) is thankful to Professor S. N. Karmakar for warm hospitality extended to him during this workshop at Saha Institute of Nuclear Physics in Kolkata. This work was supported by the EPSRC grant GR/R95432.

Publisher Copyright:
© 2007, Springer-Verlag Berlin Heidelberg.


  • Background Charge
  • Coupling Strength
  • Density Matrix
  • Impurity Index
  • Josephson Junction

ASJC Scopus subject areas

  • Condensed Matter Physics


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