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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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Generating superposition of up-to three photons for continuous variable quantum information processing.

Mitsuyoshi Yukawa1, Kazunori Miyata, Takahiro Mizuta

  • 1Department of Applied Physics, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

Optics Express
|March 14, 2013
PubMed
Summary
This summary is machine-generated.

Researchers created a continuous-wave laser method to generate photon number states. This technique produces nonclassical states, useful for quantum teleportation and operations.

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Area of Science:

  • Quantum Optics
  • Quantum Information Science

Background:

  • Generating specific quantum states is crucial for advancing quantum technologies.
  • Superpositions of photon number states are key resources for quantum information processing.

Purpose of the Study:

  • To develop an experimental scheme for generating arbitrary superpositions of photon number states using a continuous-wave laser.
  • To demonstrate the generation of superposition states involving zero to three photons.

Main Methods:

  • Utilized a continuous-wave (cw) laser system.
  • Generated advanced superpositions of two and three coherent states.
  • Employed high-efficiency photon detection.

Main Results:

  • Successfully generated superposition states of zero to three photons.
  • Observed multiple areas of negativity in the Wigner function without loss correction.
  • Demonstrated compatibility with quantum teleportation and measurement-based quantum operations.

Conclusions:

  • The developed scheme enables the creation of strongly nonclassical states.
  • The generated states are suitable for various quantum information processing tasks.
  • High detection efficiency is critical for observing nonclassical features directly.