Decoherence in circuits of small Josephson junctions

Details Decoherence in circuits of small Josephson junctions Decoherence in circuits of small Josephson junctions

2001-02-20

arxiv.org/abs/cond-mat/0102349v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.64.172509

We discuss dephasing by the dissipative electromagnetic environment and by
measurement in circuits consisting of small Josephson junctions. We present
quantitative estimates and determine in which case the circuit might qualify as
a quantum bit. Specifically, we analyse a three junction Cooper pair pump and
propose a measurement to determine the decoherence time $\tau_\phi$.

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