Model for 1/f Flux Noise in SQUIDs and Qubits
Overview
Affiliations
We propose a model for 1/f flux noise in superconducting devices (f is frequency). The noise is generated by the magnetic moments of electrons in defect states which they occupy for a wide distribution of times before escaping. A trapped electron occupies one of the two Kramers-degenerate ground states, between which the transition rate is negligible at low temperature. As a result, the magnetic moment orientation is locked. Simulations of the noise produced by randomly oriented defects with a density of 5x10(17) m(-2) yield 1/f noise magnitudes in good agreement with experiments.
Dissipative Landau-Zener tunneling in the crossover regime from weak to strong environment coupling.
Dai X, Trappen R, Chen H, Melanson D, Yurtalan M, Tennant D Nat Commun. 2025; 16(1):329.
PMID: 39747212 PMC: 11697257. DOI: 10.1038/s41467-024-55588-x.
Magnetic flux noise in superconducting qubits and the gap states continuum.
Szczesniak D, Kais S Sci Rep. 2021; 11(1):1813.
PMID: 33469096 PMC: 7815792. DOI: 10.1038/s41598-021-81450-x.
Demonstration of universal parametric entangling gates on a multi-qubit lattice.
Reagor M, Osborn C, Tezak N, Staley A, Prawiroatmodjo G, Scheer M Sci Adv. 2018; 4(2):eaao3603.
PMID: 29423443 PMC: 5804605. DOI: 10.1126/sciadv.aao3603.
Cosmological flux noise and measured noise power spectra in SQUIDs.
Beck C Sci Rep. 2016; 6:28275.
PMID: 27320418 PMC: 4917699. DOI: 10.1038/srep28275.
Magnetic resonance force microscopy of paramagnetic electron spins at millikelvin temperatures.
Vinante A, Wijts G, Usenko O, Schinkelshoek L, Oosterkamp T Nat Commun. 2011; 2:572.
PMID: 22146391 DOI: 10.1038/ncomms1581.