Testing spontaneous wavefunction collapse with quantum electromechanics

Tobar, Germain; Forstner, Stefan; Federov, Arkady; Bowen, Warwick P.

doi:10.48550/arxiv.2206.14531

Cited by 1 publication

(1 citation statement)

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“…These arguments motivate the need for further experimental investigation into the behaviours of center of mass modes of macroscopic bodies close to the quantum regime. Exploring the classical to quantum transition in mechanical resonators with minimal decoherence to the external environment could reveal further insights into GUP implications of composite systems as well as other quantum phenomena such as spontaneous wave function collapse [44][45][46]. Previous work has been undertaken in bringing low noise nano-mechanical resonators into the quantum regime through various cooling procedures [47][48][49][50][51][52], setting the stage for the confirmation of purely quantum phenomena in composite particle systems [53].…”

Section: Discussionmentioning

confidence: 99%

Electro-mechanical tuning of high-Q bulk acoustic phonon modes at cryogenic temperatures

Campbell

Galliou

Tobar

et al. 2023

Applied Physics Letters

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We investigate the electromechanical properties of quartz bulk acoustic wave resonators at extreme cryogenic temperatures. By applying a DC bias voltage, we demonstrate broad frequency tuning of high-Q phonon modes in a quartz bulk acoustic wave cavity at cryogenic temperatures of 4 K and 20 mK. More than 100 line-widths of tuning of the resonance peak without any degradation in loaded quality factor, which are as high as [Formula: see text], is seen for high order overtone modes. For all modes and temperatures, the observed coefficient of frequency tuning is [Formula: see text] 3.5 mHz/V per overtone number n corresponding to a maximum of 255.5 mHz/V for the n = 73 overtone mode. No degradation in the quality factor is observed for any value of an applied biasing field.

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