Characterisation of Cooper Pair Boxes for Quantum Bits

M. T. Savolainen, J. J. Toppari, L. Taskinen, N. Kim, K. Hansen and J. P. Pekola ()
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M. T. Savolainen: University of Jyväskylä, Department of Physics
J. J. Toppari: University of Jyväskylä, Department of Physics
L. Taskinen: University of Jyväskylä, Department of Physics
N. Kim: University of Jyväskylä, Department of Physics
K. Hansen: University of Jyväskylä, Department of Physics
J. P. Pekola: University of Jyväskylä, Department of Physics

A chapter in Macroscopic Quantum Coherence and Quantum Computing, 2001, pp 165-172 from Springer

Abstract: Abstract We have fabricated and measured single Cooper pair boxes (SCB) using superconducting single electron transistors (SET) as electrometers. The box storage performance for Cooper pairs was measured by observing the changes in the SCB island potential. We are also fabricating niobium structures, which are expected to have less problems with quasiparticle contamination than similar aluminium based devices because of the high critical temperature. The use of niobium may also reduce decoherence and thereby increase the time available for quantum logic operations.

Keywords: quantum coherence; quantum bit; Cooper pair box (search for similar items in EconPapers)
Date: 2001
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DOI: 10.1007/978-1-4615-1245-5_17

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