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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Generating arbitrary photon-number entangled states for continuous-variable quantum informatics.

Su-Yong Lee1, Jiyong Park, Hai-Woong Lee

  • 1Department of Physics, Texas A&M University at Qatar, Education City, P.O.Box 23874, Doha, Qatar.

Optics Express
|June 21, 2012
PubMed
Summary
This summary is machine-generated.

We present experimental methods for creating arbitrary photon-number entangled states (PNES). These non-Gaussian states offer advantages over Gaussian states for quantum communication and teleportation.

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Area of Science:

  • Quantum optics
  • Quantum information science

Background:

  • Entangled states are crucial for quantum information processing.
  • Non-Gaussian continuous-variable (CV) states may offer advantages over Gaussian states.

Purpose of the Study:

  • To propose experimental schemes for generating arbitrary photon-number entangled states (PNES).
  • To compare entanglement characteristics and applications of Gaussian and non-Gaussian states.
  • To assess the feasibility of proposed schemes considering experimental imperfections.

Main Methods:

  • Development of two distinct experimental schemes for PNES generation.
  • Analysis of entanglement properties, including degree of entanglement and Einstein-Podolsky-Rosen correlation.
  • Evaluation of applications in CV teleportation and nonlocality tests.
  • Inclusion of photodetector inefficiencies in the feasibility analysis.

Main Results:

  • Demonstration of methods to produce arbitrary PNES in finite dimensions.
  • Identification of practical advantages of non-Gaussian states over Gaussian states (e.g., two-mode squeezed states).
  • Comparative analysis of entanglement metrics and application potentials.
  • Confirmation of scheme feasibility with realistic experimental conditions.

Conclusions:

  • The proposed schemes enable the generation of diverse non-Gaussian entangled states.
  • Non-Gaussian states show promise for enhanced quantum teleportation and nonlocality.
  • The experimental feasibility is validated, paving the way for practical implementation.