Abstract
Controllable solid-state spin qubits are currently becoming useful building blocks for applied quantum technologies. Here, we demonstrate that in a specific type of silicon-vacancy in the 6H-SiC polytype the excited-state fine structure is inverted, compared to 4H-SiC. From the angular polarization dependencies of the emission, we reconstruct the spatial symmetry and determine the optical selection rules depending on the local deformation and spin–orbit interaction. We show that this system is well suited for the implementation of robust spin–photon entanglement schemes. Furthermore, the inverted fine structure leads to unexpected behavior of the spin readout contrast. It vanishes and recovers with lattice cooling due to two competing optical spin pumping mechanisms. Our experimental and theoretical approaches provide a deep insight into the optical and spin properties of atomic-scale qubits in SiC required for quantum communication and distributed quantum information processing.
Highlights
Interfaced solid-state spins are considered as candidates for the realization of quantum networks and photonic quantum computing[1,2]
We find that the V3 center has an unusual temperature-induced inversion of the optically detected magnetic resonance (ODMR) signal at a critical point Tc = 16 K
The PL collected from the m-face, i.e., perpendicular to the c-axis, is partially polarized along the c-axis (Fig. 2b)
Summary
Interfaced solid-state spins are considered as candidates for the realization of quantum networks and photonic quantum computing[1,2]. Due to the optical selection rules, there are robust, high-fidelity protocols for the entanglement generation between the photon polarization and the spin state.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.