6533b838fe1ef96bd12a3d8d
RESEARCH PRODUCT
Decoherence in circuits of small Josephson junctions
Jukka P. PekolaJ. Jussi Topparisubject
PhysicsJosephson effectQuantum decoherenceCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsDephasingCondensed Matter - SuperconductivityFOS: Physical sciencesCondensed Matter::Mesoscopic Systems and Quantum Hall EffectSuperconductivity (cond-mat.supr-con)Pi Josephson junctionQubitQuantum mechanicsCondensed Matter::SuperconductivityMesoscale and Nanoscale Physics (cond-mat.mes-hall)Superconducting tunnel junctionCooper pairQuantum computerdescription
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 $\tau_\phi$.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-02-20 |