Quantum Spectrometry for Arbitrary Noise

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.