Macroscopic quantum test with bulk acoustic wave resonators

• URL: http://arxiv.org/abs/2209.06635v1
• Date: Wed, 14 Sep 2022 13:39:27 GMT
• Title: Macroscopic quantum test with bulk acoustic wave resonators
• Authors: Bj\"orn Schrinski, Yu Yang, Uwe von L\"upke, Marius Bild, Yiwen Chu, Klaus Hornberger, Stefan Nimmrichter, and Matteo Fadel
• Abstract summary: We perform the most macroscopic quantum test in a mechanical resonator to date. The obtained macroscopicity of $mu= 11.3$ is on par with state-of-the-art atom interferometers.
• Score: 1.5226766869807382
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Recently, solid-state mechanical resonators have become a platform for demonstrating non-classical behavior of systems involving a truly macroscopic number of particles. Here, we perform the most macroscopic quantum test in a mechanical resonator to date, which probes the validity of quantum mechanics at the microgram mass scale. This is done by a direct measurement of the Wigner function of a high-overtone bulk acoustic wave resonator mode, monitoring the gradual decay of negativities over tens of microseconds. While the obtained macroscopicity of $\mu= 11.3$ is on par with state-of-the-art atom interferometers, future improvements of mode geometry and coherence times could confirm the quantum superposition principle at unprecedented scales.

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