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Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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Published on: February 4, 2017

Wigner function of pulsed fields by direct detection.

Maria Bondani1, Alessia Allevi, Alessandra Andreoni

  • 1National Laboratory for Ultrafast and Ultraintense Optical Science-CNR-INFM, Como, I-22100, Italy. maria.bondani@uninsubria.it

Optics Letters
|May 5, 2009
PubMed
Summary
This summary is machine-generated.

Researchers reconstructed the Wigner function for classical pulsed optical states using photon detection. This method, applied to mesoscopic intensities, can characterize nonclassical continuous-variable states.

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Area of Science:

  • Quantum optics
  • Quantum information science

Background:

  • The Wigner function is a key tool for characterizing quantum states.
  • Direct measurement of quantum states is crucial for understanding their properties.

Purpose of the Study:

  • To reconstruct the Wigner function of classical pulsed optical states.
  • To demonstrate a method applicable to nonclassical continuous-variable states.

Main Methods:

  • Direct measurement of detected-photon probability distributions.
  • Displacing optical states with a coherent field.
  • Using a photodetector with internal gain in a non-photon-resolving regime.

Main Results:

  • Successful reconstruction of the Wigner function for classical pulsed optical states.
  • Measurements performed at mesoscopic intensities (up to 30 photons per pulse).

Conclusions:

  • The presented method enables Wigner function reconstruction for pulsed optical states.
  • This technique is valuable for characterizing nonclassical continuous-variable states.