Phys.org October 13, 2022
An international team of researchers (UK, Italy) developed a molecular model system with several separate qubit units, which can be spectroscopically detected and the states of which can be switched by interacting with one another. They used pulsed Electron Paramagnetic Resonance (EPR) techniques to characterize and separately address the individual electron spin qubits; CuII, Cr7Ni ring and a nitroxide, and to determine the strength of the inter-qubit dipolar interaction. Orientation selective Relaxation-Induced Dipolar Modulation Enhancement (os-RIDME) detecting across the CuII spectrum revealed a strongly correlated CuII-Cr7Ni ring relationship; detecting on the nitroxide resonance measured both the nitroxide and CuII or nitroxide and Cr7Ni ring correlations, with switchability of the interaction based on differing relaxation dynamics, indicating a handle for implementing EPR-based quantum information processing (QIP) algorithms. According to the researchers molecular systems could afford the advantage of containing multiple qubit units, which can be easily changed and reconfigured by chemical synthesis. They could also be run at higher temperatures. This could to make quantum computing cheaper…read more. Open Access TECHNICAL ARTICLE
jGraphical abstract. Credit: Angewandte Chemie International Edition, 12 October 2022.Â