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Quantum technologies are poised to revolutionize current methods for large-scale computation and solving complex problems in quantum physics and chemistry. The fundamental units of quantum technologies, qubits, can be realized in a variety of two-level systems with long quantum coherence times, such as superconducting circuits, nitrogen vacancies in diamonds, or electronic spins in molecules. Molecular Spin Qubits (MSQs), based on the spin levels of metal ions or organic radicals, appear to be natural candidates for this role due to their inherently quantum nature. Molecules offer a high degree of versatility in their composition: synthetic chemistry allows a wide range of modifications, including fine-tuning the interaction between multiple qubits or changing the ligand shell to meet specific practical demands, such as transferring the qubits onto a solid substrate or into a device.
Despite the promising potential of MSQs in quantum technologies, several challenges remain. These include the deposition of the molecules on a surface without negatively affecting the quantum coherence, as well as innovating resonators that can interact with surface-bound MSQs.
