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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Phase stabilization of a frequency comb using multipulse quantum interferometry.

Andrea Cadarso1, Jordi Mur-Petit2, Juan José García-Ripoll3

  • 1Instituto de Física Fundamental, IFF-CSIC, Serrano 113 b, Madrid 28006, Spain and Departamento de Análisis Matemático, Universidad Complutense de Madrid, 24040 Madrid, Spain.

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Summary

We developed quantum protocols to precisely measure the carrier-envelope offset phase using atomic qubit coherence. This method enhances sensitivity and avoids complex laser setups, offering a simpler approach for quantum metrology.

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Area of Science:

  • Quantum optics
  • Atomic physics
  • Quantum information science

Background:

  • Accurate determination of the carrier-envelope offset phase is crucial for frequency comb applications.
  • Existing methods often require complex setups like frequency doubling or octave-spanning combs.
  • Atomic qubits offer a promising platform for high-precision measurements.

Purpose of the Study:

  • To derive novel quantum protocols for carrier-envelope offset phase determination.
  • To utilize atomic qubit coherence as a reference for phase measurement.
  • To enhance measurement sensitivity without complex optical configurations.

Main Methods:

  • Interaction between a frequency comb and an atomic qubit.
  • Development of multipulse quantum protocols.
  • Utilizing qubit coherence, optical/hyperfine qubits, Λ schemes, and Raman transitions.
  • Exploring alternative references like continuous-wave lasers or other frequency combs.

Main Results:

  • Quantum protocols for carrier-envelope offset phase measurement derived.
  • Qubit coherence successfully used as a phase reference.
  • Eliminated the need for frequency doubling or octave-spanning combs.
  • Multipulse protocols show polynomial sensitivity enhancement O(N-2) with N pulses.

Conclusions:

  • The proposed quantum protocols offer a simplified and more sensitive method for carrier-envelope offset phase determination.
  • These protocols leverage atomic qubit properties for robust quantum metrology.
  • The findings pave the way for improved precision in frequency comb spectroscopy and related quantum technologies.