Non-classical correlations between phonons and photons in a
MHz-frequency mechanical oscillator coupled to an optical cavity
- URL: http://arxiv.org/abs/2312.05641v1
- Date: Sat, 9 Dec 2023 19:08:18 GMT
- Title: Non-classical correlations between phonons and photons in a
MHz-frequency mechanical oscillator coupled to an optical cavity
- Authors: Ivan Galinskiy, Georg Enzian, Micha{\l} Parniak, Eugene Polzik
- Abstract summary: We show non-classical correlations between phonons and photons created using opto-mechanical spontaneous parametric down-conversion.
We also show strong signs of quantum coherence, which we demonstrate by single-photon counting enabled by our state-of-the-art optical filtering system.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We demonstrate non-classical correlations between phonons and photons created
using opto-mechanical spontaneous parametric down-conversion in a system based
on a soft-clamped ultracoherent membrane oscillator inside of a Fabry-P\'erot
optical resonator. We show that phonons stored in the mechanical oscillator,
when subsequently read out, display strong signs of quantum coherence, which we
demonstrate by single-photon counting enabled by our state-of-the-art optical
filtering system. We observe a violation of the classical Cauchy-Schwarz
inequality with a confidence of >92%. The presented system demonstrates the
potential for studies of low-frequency quantum effects in sub-millimeter size
nanogram-scale mechanical oscillators.
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