Work

Model for 1 / f Flux Noise in SQUIDs and Qubits

Year: 2007

Type: article

Abstract: 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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.98.267003

Authors: Roger H. Koch, David P. DiVincenzo, John Clarke

Institutions: IBM Research - Thomas J. Watson Research Center, Lawrence Berkeley National Laboratory, University of California, Berkeley

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Office of Science, Basic Energy Sciences, Army Research Office