0000000000724772

AUTHOR

L. Taskinen

showing 2 related works from this author

Characterisation of Cooper pair boxes for quantum computing

2001

We have measured and characterised superconducting single Cooper pair boxes (SCB) using superconducting single electron transistor (SET) fabricated on the same chip as an electrometer. The electrometer is sensitive to the potential changes of the SCB island and thus measures the number of excess Cooper pairs on the island. The boxes were of the Al/AlOx/Al Josephson junction type. The SCB and SET were characterised separately and the box storage performance for Cooper pairs was analysed by observing the changes in the SCB island potential while sweeping the gate voltage.

SuperconductivityJosephson effectPhysicsCondensed matter physicsEnergy Engineering and Power TechnologyCoulomb blockadeElectrometerCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsQuantum dotElectrical and Electronic EngineeringCooper pairQuantum tunnellingQuantum computerPhysica C: Superconductivity
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Characterisation of Cooper Pair Boxes for Quantum Bits

2001

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.

PhysicsSuperconductivityQuantum decoherenceCondensed matter physicsTransistorNiobiumchemistry.chemical_elementCondensed Matter::Mesoscopic Systems and Quantum Hall EffectQuantum logiclaw.inventionchemistrylawCondensed Matter::SuperconductivityQubitQuasiparticleCooper pair
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