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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/22477

Title: Some implications of superconducting quantum interference to the application of master equations in engineering quantum technologies
Authors: Duffus, Stephen
Bjergstrom, Keiran N.
Dwyer, Vincent M.
Samson, J.H.
Spiller, T.P.
Zagoskin, Alexandre M.
Munro, W.J.
Nemoto, Kae
Everitt, Mark J.
Issue Date: 2016
Publisher: © American Physical Society
Citation: 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.
Abstract: In 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.
Description: This paper was accepted for publication in the journal Physical Review B - Condensed Matter and Materials Physics and the definitive published version is available at http://dx.doi.org/10.1103/PhysRevB.94.064518
Version: Accepted for publication
DOI: 10.1103/PhysRevB.94.064518
URI: https://dspace.lboro.ac.uk/2134/22477
Publisher Link: http://dx.doi.org/10.1103/PhysRevB.94.064518
ISSN: 0163-1829
Appears in Collections:Published Articles (Physics)

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