Anisotropic Landau-Lifshitz-Gilbert models of dissipation in qubits
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.
- Publication:
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Physical Review A
- Pub Date:
- December 2016
- DOI:
- arXiv:
- arXiv:1503.00651
- Bibcode:
- 2016PhRvA..94f2106C
- Keywords:
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- Condensed Matter - Mesoscale and Nanoscale Physics;
- Quantum Physics
- E-Print:
- 12 pages, 10 figures