Extremely high Q-factor mechanical modes in quartz bulk acoustic wave resonators at millikelvin temperature

Goryachev, Maxim; Creedon, Daniel L.; Ivanov, Eugene; Galliou, Serge; Bourquin, R.; Tobar, Michael E.

doi:10.1063/1.4903104

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…are small fluctuations of the resonator damping, detuning frequency, and attenuation. H i and H r are transfer matrices for corresponding instabilities 38,39 . In order to simplify the analysis, the amplifier is considered to have infinite input and output impedances, so the derived MIMO model is relevant.…”

Section: Theoretical Explanation Of the Measured Resultsmentioning

confidence: 99%

Advances in development of quartz crystal oscillators at liquid helium temperatures

et al. 2013

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This work presents some recent results in the field of liquid helium bulk acoustic wave oscillators. The discussion covers the whole development procedure starting from component selection and characterization and concluding with actual phase noise measurements. The associated problems and limitations are discussed. The unique features of obtained phase noise power spectral densities are explained with a proposed extension of the Leeson effect.

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Section: Theoretical Explanation Of the Measured Resultsmentioning

confidence: 99%

Advances in development of quartz crystal oscillators at liquid helium temperatures

et al. 2013

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“…A more favorable acoustic system can be constructed by using the low-frequency modes of a ∼ 10 millimeter sized bulkacoustic resonator 38 (Fig. 3(f)).…”

Section: Candidate Mechanical Systems To Detect Gr Effectsmentioning

confidence: 99%

Superconducting electro-mechanics to test Diósi–Penrose effects of general relativity in massive superpositions

Gely

Steele

2021

AVS Quantum Science

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Attempting to reconcile general relativity with quantum mechanics is one of the great undertakings of contemporary physics. Here, the authors present how the incompatibility between the two theories arises in the simple thought experiment of preparing a heavy object in a quantum superposition. Following Penrose's analysis of the problem, the authors determine the requirements on physical parameters to perform experiments where both theories potentially interplay. The authors use these requirements to compare different systems, focusing on mechanical oscillators that can be coupled to superconducting circuits.

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“…On the other hand, recent progress in the design of mechanical systems has allowed reaching much higher quality factors in excess of 10 9 [18,19,20,21,22,23]. At milliKelvin temperatures, such ultracoherent mechanical devices can reach t coh > 100 ms, some three orders of magnitude beyond the stateof-the-art (provided excess dephasing [21] is not an issue).…”

Section: Introductionmentioning

confidence: 99%

“…At milliKelvin temperatures, such ultracoherent mechanical devices can reach t coh > 100 ms, some three orders of magnitude beyond the stateof-the-art (provided excess dephasing [21] is not an issue). However, so far, the mechanics' coupling to microwave modes has either been extremely weak [18], or absent because of lacking functionalization through e.g. metallization [19,20,22,23].…”

Section: Introductionmentioning

confidence: 99%

Ground State Cooling of an Ultracoherent Electromechanical System

Seis,

Capelle,

Langman

et al. 2021

Preprint

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Cavity electromechanics relies on parametric coupling between microwave and mechanical modes to manipulate the mechanical quantum state, and provide a coherent interface between different parts of hybrid quantum systems. High coherence of the mechanical mode is of key importance in such applications, in order to protect the quantum states it hosts from thermal decoherence. Here, we introduce an electromechanical system based around a soft-clamped mechanical resonator with an extremely high Q-factor (> 10 9 ) held at very low (30 mK) temperatures. This ultracoherent mechanical resonator is capacitively coupled to a microwave mode, strong enough to enable ground-state-cooling of the mechanics (nmin = 0.76 ± 0.16). This paves the way towards exploiting the extremely long coherence times (t coh > 100 ms) offered by such systems for quantum information processing and state conversion.

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Extremely high Q-factor mechanical modes in quartz bulk acoustic wave resonators at millikelvin temperature

Cited by 6 publications

References 6 publications

Advances in development of quartz crystal oscillators at liquid helium temperatures

Advances in development of quartz crystal oscillators at liquid helium temperatures

Superconducting electro-mechanics to test Diósi–Penrose effects of general relativity in massive superpositions

Ground State Cooling of an Ultracoherent Electromechanical System

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