Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Model of magnetic impurities within the Josephson junction of a phase qubita

Published

Author(s)

David P. Pappas, R. P. Erickson

Abstract

We consider a superconducting phase qubit consisting of a monocrystalline sapphire Josephson junction with symmetry axis perpendicular to the junction interfaces. Via the London gauge we present a theoretical model of Fe3+ magnetic impurities within the junction that describes the effect of a low concentration of impurities on the operation of a superconducting phase qubit. Specifically, we derive an interaction Hamiltonian expressed in terms of angular momentum states of the magnetic impurities and low-lying oscillator states of the qubit. We comment on the coherent coupling between qubit and magnetic impurities within the model, including the near-resonance behavior of qubit and Fe3+ electron states. 85.25.Dq,
Citation
Physical Review B (Condensed Matter and Materials Physics)
Volume
23

Keywords

phase qubit, junction, impurity, two level system, tls

Citation

Pappas, D. and Erickson, R. (2009), Model of magnetic impurities within the Josephson junction of a phase qubita, Physical Review B (Condensed Matter and Materials Physics), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902285 (Accessed May 30, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created December 23, 2009, Updated February 19, 2017