6533b858fe1ef96bd12b5b69
RESEARCH PRODUCT
Measurement and dephasing of a flux qubit due to heat currents
Fabian HasslerJanine SplettstoesserSamuele SpillaSamuele Spillasubject
SuperconductivityJosephson effectPhysicsFlux qubitQuantum PhysicsHeat currentCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsDephasingGeneral Physics and AstronomyFOS: Physical sciencesQuantum PhysicsSettore FIS/03 - Fisica Della MateriaTemperature gradientComputer Science::Emerging TechnologiesSUPERCONDUCTIVITY QUBIT THERMAL CURRENT THERMAL DEPHASINGQubitCondensed Matter::SuperconductivityMesoscale and Nanoscale Physics (cond-mat.mes-hall)Quantum Physics (quant-ph)Coherence (physics)description
We study a flux qubit, made of a superconducting loop interrupted by three Josephson junctions, which is subject to a temperature gradient. We show that the heat current induced by the temperature gradient, being sensitive to the superconducting phase differences at the junctions, depends significantly on the state of the qubit. We furthermore investigate the impact of the heat current on the coherence properties of the qubit state. We have found that even small temperature gradients can lead to dephasing times of the order of microseconds for the Delft-qubit design.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-11-29 |