Macroscopic Quantum Test with Bulk Acoustic Wave Resonators
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2023-03-31
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Journal Article
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Abstract
Recently, solid-state mechanical resonators have become a platform for demonstrating nonclassical 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 by ruling out a classical description 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 1/4 11.3 is on par with state-of-the-art atom interferometers, future improvements of mode geometry and coherence times could test the quantum superposition principle at unprecedented scales and also place more stringent bounds on spontaneous collapse models.
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published
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130 (13)
Pages / Article No.
133604
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American Physical Society
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204073 - Multimode quantum processors with acoustic resonators (SNF)