Science Daily October 13, 2022
An international team of researcher (US – University of Chicago, MIT, Northwestern University, Argonne National Laboratory, UK) demonstrated how the spin coherence in optically addressable molecular qubits can be controlled through engineering their host environment. By inserting chromium (IV)-based molecular qubits into a nonisostructural host matrix, they generated noise-insensitive clock transitions, through a transverse zero-field splitting, that are not present when using an isostructural host. This led to spin-coherence times of more than 10μs for optically addressable molecular spin qubits in a nuclear and electron-spin-rich environment. they modeled the dependence of spin coherence on transverse zero-field splitting from first principles and experimentally verified the theoretical predictions with four distinct molecular systems. They also explored how to further enhance optical-spin interfaces in molecular qubits by investigating the key parameters of optical linewidth and spin-lattice relaxation time. According to the researchers they demonstrated the ability to test qubit structure-function relationships through a tunable molecular platform and highlighted opportunities for using molecular qubits for nanoscale quantum sensing in noisy environments…read more. Open Access TECHNICAL ARTICLEÂ
Enhanced optical contrast and spin-lattice relaxation time for host-matrix engineered molecular qubits. Credit: Phys. Rev. X 12, 031028,18 August 2022Â