Abstract
In quantum sensing, capable of sensing small magnetic fields originating from motion of electrons, quantum bits (qubits) are preferably operational at room temperature. Recently, smartly tailored organic Molecular Quantum Bits (MQBs) have emerged as platforms for the realization of electron spin qubits, which bring many advantages such as long coherence times, exact positioning of the qubit and tunability through chemical synthesis and scalability. Yet, the implementation of MQBs is obstructed by the lack of single-qubit readout and the so far unknown relationship between qubit performance and chemical structure. Within ReadBITS, diradicals, i.e. organic molecules with two unpaired electron spins in their ground electronic state, will be integrated with carbon nanotubes (CNTs) working towards methods for single entity readout of the spin states, either electrically or optically. Recent progress in the synthesis of such diradicals leads to an uncharted market for MQBs, where spin-spin interactions can be controlled through chemical synthesis. While ensemble measurements are promising, single-entity readout might only be possible through integrating the MQBs with other systems, such as CNTs. Within this project, different readout strategies will be designed based on both spin-to-charge and spin-to-photon conversion for MQB-CNT hybrids. This project will provide new routes towards single MQB readout, boosting the implementation of diradicals in quantum applications.
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