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Quantum Spectrometry for Arbitrary Noise.

Daniel Goldwater1, P F Barker1, Angelo Bassi2

  • 1Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.

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|December 24, 2019
PubMed
Summary
This summary is machine-generated.

We developed a method to recover the spectrum of non-Markovian noise affecting a harmonic oscillator. This technique, demonstrated with a levitated nanosphere, can probe electric field noise from 10^2 to 10^6 Hz.

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Area of Science:

  • Quantum physics
  • Quantum optics
  • Condensed matter physics

Background:

  • Non-Markovian environments and noise sources significantly impact quantum systems.
  • Characterizing these complex interactions is crucial for quantum technologies.
  • Existing methods often require stringent conditions or are limited in scope.

Purpose of the Study:

  • To present a novel technique for recovering the spectral properties of non-Markovian bosonic baths and/or noise.
  • To establish minimal conditions for the applicability of this spectral recovery method.
  • To demonstrate the technique's practical utility in a relevant experimental setup.

Main Methods:

  • Developing a theoretical framework for spectral recovery applicable to non-Markovian environments.
  • Validating the technique under conditions of a large, hot environment with symmetric temporal autocorrelation functions.
  • Modeling the technique's application to a nanosphere levitated in a Paul trap.

Main Results:

  • The technique effectively recovers the spectrum of non-Markovian noise.
  • Demonstrated capability to probe electric field noise spectrum in the range of 10^2 to 10^6 Hz.
  • Achieved spectral resolution inversely proportional to measurement time.

Conclusions:

  • The presented technique offers a robust method for characterizing non-Markovian noise spectra.
  • This method has broad applicability in quantum sensing, metrology, and quantum computing.
  • It provides a new experimental tool for investigating fundamental physics questions.