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

We investigate the microwave magnetic 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 microwave resonant cavity photons and solid state spins. Specifically, we design cavitie...

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Bibliographic Details
Published in:Journal of applied physics 2016-04, Vol.119 (15)
Main Authors: Le Floch, J.-M., Delhote, N., Aubourg, M., Madrangeas, V., Cros, D., Castelletto, S., Tobar, M. E.
Format: Article
Language:English
Subjects:
Applied physics
Cavity resonators
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Computer architecture
Coupling
Design defects
Design parameters
DIAMONDS
Electron spin
ELECTRONS
FINITE ELEMENT METHOD
MAGNETIC FIELDS
Magnetic resonance
MICROWAVE RADIATION
NITROGEN
ONE-DIMENSIONAL CALCULATIONS
PARAMAGNETISM
Photonics
PHOTONS
QUANTUM COMPUTERS
Quantum computing
QUANTUM INFORMATION
Quantum phenomena
READOUT SYSTEMS
RESONANCE
Solid state
SOLIDS
SPIN
Spin resonance
STRONG-COUPLING MODEL
SUPERCONDUCTING CAVITY RESONATORS
THREE-DIMENSIONAL CALCULATIONS
VACANCIES
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Summary:We investigate the microwave magnetic 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 microwave resonant cavity 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 resonator cavity, 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.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4946893