Quantum Non-Gaussian States of Superfluid Helium Vibrations

• URL: http://arxiv.org/abs/2406.09918v1
• Date: Fri, 14 Jun 2024 10:59:10 GMT
• Title: Quantum Non-Gaussian States of Superfluid Helium Vibrations
• Authors: Andrey A. Rakhubovsky, Radim Filip,
• Abstract summary: Quantum non-Gaussian states of phononic systems coupled to light are essential for studies of single-phonon mechanics. We propose the quantum non-Gaussian generation of few-phonon states of low-temperature vibrating super Helium.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum non-Gaussian states of phononic systems coupled to light are essential for fundamental studies of single-phonon mechanics and direct applications in quantum technology. Although nonclassical mechanical states have already been demonstrated, more challenging quantum non-Gaussianity of such states remains limited. Using photon counting detection, we propose the quantum non-Gaussian generation of few-phonon states of low-temperature vibrating superfluid Helium. We predict the quantum non-Gaussian depth of such phononic states and investigate their robustness under relevant mechanical heating. As the quality of such phononic states is very high, we confirm a single-phonon bunching capability to further classify such states for future mechanical experiments. Moreover, we predict increasing capability for force sensing and thermometry for increasing heralded phonon numbers.

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