Towards a mechanical quantum bit

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This project focuses on the realization of a completely new qubit, where the information is stored in the electromechanical vibrations. We propose to realize a mechanical qubit by coupling the mechanical vibrations of a nanotube resonator to a double-quantum dot formed along the suspended nanotube. Nanotubes are the ideal system for such an experiment, since their high mechanical quantum fluctuation amplitude boosts the single-phonon electromechanical coupling strength. We may reach sub-kHz decoherence rate for the mechanical qubit. Such a demonstration would be a breakthrough in quantum science, offering new perspectives for quantum networks and quantum sensing.