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Time-resolved Bell Correlation Spectroscopy of Molecular Vibrations

Abstract : Quantum states of bulk oscillators can be important resources for quantum technologies. The development of versatile techniques to prepare and measure such states can in turn shed new light on the processes and time scales of decoherence in vibrational excitations. Here, we present a new scheme leveraging universal properties of Raman scattering to create quantum correlations between light and vibration that are strong enough to violate a Bell inequality. We measure the decay of these hybrid photon-phonon Bell correlations with sub-picosecond time-resolution and observe the decoherence of a vibrational qubit encoded in two time bins. The experiment relies on a molecular vibrational mode featuring a record number of ∼ 1000 quantum coherent oscillations at ambient conditions, which scatters light inelastically and can therefore be addressed by time-resolved single photon Raman spectroscopy. It paves the way for the study of quantum correlations in highly complex solid-state and molecular systems in their natural state, i.e. without any engineering of their coherence properties or interaction mechanisms.
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Submitted on : Thursday, December 12, 2019 - 4:20:02 PM
Last modification on : Sunday, June 26, 2022 - 2:44:45 AM
Long-term archiving on: : Friday, March 13, 2020 - 11:09:08 PM


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  • HAL Id : cea-02407802, version 1


Santiago Tarrago Velez, Vivishek Sudhir, Nicolas Sangouard, Christophe Galland. Time-resolved Bell Correlation Spectroscopy of Molecular Vibrations. 2019. ⟨cea-02407802⟩



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