Crowley, PJD;
Green, AG;
(2016)
Anisotropic Landau-Lifshitz-Gilbert models of dissipation in qubits.
Physical Review A
, 94
, Article 062106. 10.1103/PhysRevA.94.062106.
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Abstract
We derive a microscopic model for dissipative dynamics in a system of mutually interacting qubits coupled to a thermal bath that generalizes the dissipative model of Landau-Lifshitz-Gilbert to the case of anisotropic bath couplings. We show that the dissipation acts to bias the quantum trajectories towards a reduced phase space. This model applies to a system of superconducting flux qubits whose coupling to the environment is necessarily anisotropic. We study the model in the context of the D-Wave computing device and show that the form of environmental coupling in this case produces dynamics that are closely related to several models proposed on phenomenological grounds.
| Type: | Article |
|---|---|
| Title: | Anisotropic Landau-Lifshitz-Gilbert models of dissipation in qubits |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevA.94.062106 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevA.94.062106 |
| Language: | English |
| Additional information: | Copyright © 2016 American Physical Society. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1517573 |
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