Pith. sign in

REVIEW 2 cited by

Observation of the Fundamental Nyquist Noise Limit in an Ultra-High $Q$-Factor Cryogenic Bulk Acoustic Wave Cavity

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 1410.4293 v1 pith:G2CQ2ZGU submitted 2014-10-16 physics.ins-det cond-mat.stat-mechquant-ph

Maxim Goryachev , Eugene N. Ivanov , Frank van Kann , Serge Galliou , Michael E. Tobar This is my paper
classification physics.ins-detcond-mat.stat-mechquant-ph
keywords acousticdevicenoisenyquistthermalbulkcryogenicfactor
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
abstract

Thermal Nyquist noise fluctuations of high-$Q$ Bulk Acoustic Wave (BAW) cavities have been observed at cryogenic temperatures with a DC Superconducting Quantum Interference Device (SQUID) amplifier. High $Q$ modes with bandwidths of few tens of milliHz produce thermal fluctuations with a Signal-To-Noise ratio of up to 23dB. The estimated effective temperature from the Nyquist noise is in good agreement with the physical temperature of the device, confirming the validity of the equivalent circuit model and the non-existence of any excess resonator self-noise. The measurements also confirm that the quality factor remains extremely high ($Q>10^8$ at low order overtones) for very weak (thermal) system motion at low temperatures, when compared to values measured with relatively strong external excitation. This result represents an enabling step towards operating such a high-Q acoustic device at the standard quantum limit.

Discussion (0). Sign in to comment.

Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Search for High-Frequency Gravitational Waves via Geomagnetic Conversion with Radio Telescopes

    gr-qc 2026-06 unverdicted novelty 7.0 of 10

    First search for high-frequency gravitational waves via inverse Gertsenshtein conversion in Earth's magnetic field with VLA and ALMA sets new upper limits h_c ≲ 10^{-18} from 1 GHz to 1 THz.

  2. High-Frequency Gravitational Wave Detection with Superconducting Qubits

    hep-ph 2026-08 conditional novelty 6.0 of 10

    An idealized model shows that Dicke-entangled transmon qubits at the TE212 cavity mode could reach a strain sensitivity of about 5.6e-26 at 5 GHz, scaling as n_q^{-3/4}.

Pith tools