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arXiv · 2008.11130

Quantum Nondemolition Photon Counting With a Hybrid Electromechanical Probe

Junjie Liu·Hsing-Ta Chen·Dvira Segal
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Abstract

Quantum nondemolition (QND) measurements of photons is a much pursued endeavor in the field of quantum optics and quantum information processing. Here we propose a novel hybrid optoelectromechanical platform that integrates a cavity system with a hybrid electromechanical probe for QND photon counting. Building upon a mechanical-mode-mediated nonperturbative electro-optical dispersive coupling, our protocol performs the QND photon counting measurement by means of the current-voltage characteristics of the probe. In particular, we show that the peak voltage shift of the differential conductance is linearly dependent on the photon occupation number, thus providing a sensitive measure of the photon number, especially in the strong optomechanical coupling regime. Given that our proposed hybrid system is compatible with state-of-the-art experimental techniques, we discuss its implementations and anticipate applications in quantum optics and polariton physics.

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Junjie Liu, Hsing-Ta Chen, Dvira Segal. 2020-08-25. Quantum Nondemolition Photon Counting With a Hybrid Electromechanical Probe. https://doi.org/10.1103/physreva.102.061501

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