Microscopic origin of low frequency flux noise in Josephson circuits
arXiv:0712.2834 · doi:10.1103/PhysRevLett.100.227005
Abstract
We analyze the data and discuss their implications for the microscopic origin of the low frequency flux noise in superconducting circuits. We argue that this noise is produced by spins at the superconductor insulator boundary whose dynamics is due to RKKY interaction. We show that this mechanism explains size independence of the noise, different frequency dependences of the spectra reported in large and small SQUIDs and gives the correct intensity for realistic parameters.
4 pages, no figures
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Cited by in corpus (8)
- Magnetism in SQUIDs at Millikelvin Temperatures
- Decoherence in qubits due to low-frequency noise
- Probing Noise in Flux Qubits via Macroscopic Resonant Tunneling
- Geometrical dependence of low frequency noise in superconducting flux qubits
- Spin-like susceptibility of metallic and insulating thin films at low temperature
- Relaxation of Josephson qubits due to strong coupling to two-level systems
- Probing a composite spin-boson environment
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