Quantum Harmonic Oscillator Spectrum Analyzers

Characterization and suppression of noise are essential for the control of harmonic oscillators in the quantum regime. We measure the noise spectrum of a quantum harmonic oscillator from low frequency to near the oscillator resonance by sensing its response to amplitude modulated periodic drives wit...

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Bibliographic Details
Published inPhysical review letters Vol. 126; no. 25; p. 250507
Main Authors Keller, Jonas, Hou, Pan-Yu, McCormick, Katherine C, Cole, Daniel C, Erickson, Stephen D, Wu, Jenny J, Wilson, Andrew C, Leibfried, Dietrich
Format Journal Article
LanguageEnglish
Published United States 25.06.2021
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Summary:Characterization and suppression of noise are essential for the control of harmonic oscillators in the quantum regime. We measure the noise spectrum of a quantum harmonic oscillator from low frequency to near the oscillator resonance by sensing its response to amplitude modulated periodic drives with a qubit. Using the motion of a trapped ion, we experimentally demonstrate two different implementations with combined sensitivity to noise from 500 Hz to 600 kHz. We apply our method to measure the intrinsic noise spectrum of an ion trap potential in a previously unaccessed frequency range.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.126.250507