Quantum oscillator noise spectroscopy via displaced cat states
- URL: http://arxiv.org/abs/2010.04375v2
- Date: Thu, 29 Jul 2021 23:38:38 GMT
- Title: Quantum oscillator noise spectroscopy via displaced cat states
- Authors: Alistair R. Milne, Cornelius Hempel, Li Li, Claire L. Edmunds, Harry
J. Slatyer, Harrison Ball, Michael R. Hush, Michael J. Biercuk
- Abstract summary: We reconstruct the noise spectrum using a series of different drive phase and amplitude modulation patterns.
We apply the technique to the identification of intrinsic noise in the motional frequency of a single trapped ion.
- Score: 2.336697823214672
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum harmonic oscillators are central to many modern quantum technologies.
We introduce a method to determine the frequency noise spectrum of oscillator
modes through coupling them to a qubit with continuously driven
qubit-state-dependent displacements. We reconstruct the noise spectrum using a
series of different drive phase and amplitude modulation patterns in
conjunction with a data-fusion routine based on convex optimization. We apply
the technique to the identification of intrinsic noise in the motional
frequency of a single trapped ion with sensitivity to fluctuations at the
sub-Hz level in a spectral range from quasi-DC up to 50 kHz.
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