Iterative Adaptive Spectroscopy of Short Signals

Area of Science:

• Quantum sensing
• Atomic physics
• Interferometry

Background:

• Accurate frequency estimation is crucial in various scientific fields.
• Traditional methods face challenges with decaying signals and experimental overhead.
• Ramsey interferometry offers a promising approach for precise measurements.

Purpose of the Study:

• To develop an iterative, adaptive frequency sensing protocol.
• To achieve high-precision frequency estimation from short, finite signals.
• To overcome limitations of existing signal processing and experimental sampling.

Main Methods:

• Utilizing Ramsey interferometry on a two-level system.
• Implementing an iterative procedure to mitigate systematic errors.
• Enhancing the Ramsey sequence for high-fidelity state preparation and readout.

Main Results:

• The protocol accurately estimates unknown frequencies from limited Ramsey fringes.
• It effectively handles decaying signals and reduces sampling overhead.
• Achieved high precision comparable to or exceeding state-of-the-art methods.

Conclusions:

• The developed protocol offers a significant speedup in frequency estimation.
• It maintains high precision while reducing experimental complexity.
• This advancement has implications for quantum sensing and metrology.