PhysRevB.94.064518.pdf (352.38 kB)
Some implications of superconducting quantum interference to the application of master equations in engineering quantum technologies
journal contribution
posted on 2016-09-16, 13:44 authored by Stephen N.A. Duffus, Kieran Bjergstrom, Vincent Dwyer, John Samson, T.P. Spiller, Alexandre ZagoskinAlexandre Zagoskin, W.J. Munro, Kae Nemoto, Mark EverittMark EverittIn this paper we consider the modeling and simulation of open quantum systems from a device engineering perspective. We derive master equations at different levels of approximation for a superconducting quantum interference device (SQUID) ring coupled to an ohmic bath. We demonstrate that the master equations we consider produce decoherences that are qualitatively and quantitatively dependent on both the level of approximation and the ring's external flux bias. We discuss the issues raised when seeking to obtain Lindbladian dissipation and show, in this case, that the external flux (which may be considered to be a control variable in some applications) is not confined to the Hamiltonian, as often assumed in quantum control, but also appears in the Lindblad terms.
History
School
- Science
Department
- Physics
Published in
Physical Review B - Condensed Matter and Materials PhysicsVolume
94Citation
DUFFUS, S. ...et al., 2016. Some implications of superconducting quantum interference to the application of master equations in engineering quantum technologies. Physical Review B - Condensed Matter and Materials Physics, 94, 064518.Publisher
© American Physical SocietyVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2016-08-02Publication date
2016-08-24Notes
This paper was accepted for publication in the journal Physical Review B - Condensed Matter and Materials Physics and the definitive published version is also available at http://dx.doi.org/10.1103/PhysRevB.94.064518ISSN
0163-1829Publisher version
Language
- en