6533b863fe1ef96bd12c78c5
RESEARCH PRODUCT
Probing High Frequency Noise with Macroscopic Resonant Tunneling
Paul I. BunykDmitri V. AverinGildert SuzanneMark W. JohnsonJ. JohanssonTrevor LantingFabio AltomareRichard HarrisAndrew J. BerkleyM. H. S. AminE. TolkachevaE. Ladizinskysubject
PhysicsFlux qubitQuantum decoherenceCondensed matter physicsNoise spectral densityCondensed Matter - SuperconductivityFOS: Physical sciencesCondensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectElectronic Optical and Magnetic MaterialsComputational physicsSuperconductivity (cond-mat.supr-con)AmplitudeOhmic contactQuantum tunnellingQuantum computerLine (formation)description
We have developed a method for extracting the high-frequency noise spectral density of an rf-SQUID flux qubit from macroscopic resonant tunneling (MRT) rate measurements. The extracted noise spectral density is consistent with that of an ohmic environment up to frequencies $~$4 GHz. We have also derived an expression for the MRT line shape expected for a noise spectral density consisting of such a broadband ohmic component and an additional strongly peaked low-frequency component. This hybrid model provides an excellent fit to experimental data across a range of tunneling amplitudes and temperatures.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-03-09 |