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RESEARCH PRODUCT

Characterisation of Cooper Pair Boxes for Quantum Bits

N. KimJukka P. PekolaJ. Jussi ToppariKlavs HansenMarko T. SavolainenL. Taskinen

subject

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

description

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.

yearjournalcountryeditionlanguage
2001-01-01
https://doi.org/10.1007/978-1-4615-1245-5_17