Towards achieving strong coupling in three-dimensional-cavity with solid state spin resonance

Le Floch, J, Delhote, N, Aubourg, M, Madrangeas, V, Cros, D, Castelletto, S and Tobar, M 2016, 'Towards achieving strong coupling in three-dimensional-cavity with solid state spin resonance', Journal of Applied Physics, vol. 119, no. 15, 153901, pp. 1-8.


Document type: Journal Article
Collection: Journal Articles

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Title Towards achieving strong coupling in three-dimensional-cavity with solid state spin resonance
Author(s) Le Floch, J
Delhote, N
Aubourg, M
Madrangeas, V
Cros, D
Castelletto, S
Tobar, M
Year 2016
Journal name Journal of Applied Physics
Volume number 119
Issue number 15
Article Number 153901
Start page 1
End page 8
Total pages 8
Publisher American Institute of Physics
Abstract We investigate the microwavemagnetic field confinement in several microwave three-dimensional (3D)-cavities, using a 3D finite-element analysis to determine the best design and achieve a strong coupling between microwaveresonantcavity photons and solid state spins. Specifically, we design cavities for achieving strong coupling of electromagnetic modes with an ensemble of nitrogen vacancy (NV) defects in diamond. We report here a novel and practical cavity design with a magnetic filling factor of up to 4 times (2 times higher collective coupling) than previously achieved using one-dimensional superconducting cavities with a small mode volume. In addition, we show that by using a double-split resonatorcavity, it is possible to achieve up to 200 times better cooperative factor than the currently demonstrated with NV in diamond. These designs open up further opportunities for studying strong and ultra-strong coupling effects on spins in solids using alternative systems with a wider range of design parameters. The strong coupling of paramagnetic spin defects with a photonic cavity is used in quantum computer architecture, to interface electrons spins with photons, facilitating their read-out and processing of quantum information. To achieve this, the combination of collective coupling of spins and cavity mode is more feasible and offers a promising method. This is a relevant milestone to develop advanced quantum technology and to test fundamental physics principles.
Subject Condensed Matter Physics not elsewhere classified
Quantum Information, Computation and Communication
DOI - identifier 10.1063/1.4946893
Copyright notice © 2016 Author(s).
ISSN 0021-8979
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