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Gaussian entanglement generation from coherence using beam-splitters.

Zhong-Xiao Wang1, Shuhao Wang2, Teng Ma2

  • 1State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China.

Scientific Reports
|November 29, 2016
PubMed
Summary
This summary is machine-generated.

Single-mode Gaussian coherence can generate quantum entanglement using beam-splitters. This study shows coherence and entanglement can interconvert, allowing full entanglement extraction from coherence.

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Quantum Information Processing

Background:

  • Quantum entanglement and coherence are vital resources for quantum information processing.
  • Understanding their interconversion is key to developing quantum technologies.

Purpose of the Study:

  • To investigate the transition of Gaussian correlation under linear optical beam-splitters.
  • To explore the role of single-mode Gaussian coherence in generating Gaussian entanglement.
  • To analyze the interconversion between single-mode coherence and quantum entanglement.

Main Methods:

  • Theoretical study of Gaussian states and linear optical transformations.
  • Analysis of beam-splitter interactions on quantum states.
  • Quantification of Gaussian coherence and entanglement.

Main Results:

  • Single-mode Gaussian coherence serves as a resource for generating Gaussian entanglement from two squeezed states.
  • Consecutive beam-splitters facilitate the conversion between single-mode coherence and quantum entanglement.
  • Complete extraction of entanglement from single-mode coherence is achievable with a finite number of beam-splitters, even after entanglement loss.

Conclusions:

  • The interconversion between Gaussian coherence and entanglement is demonstrated using beam-splitters.
  • This provides a pathway for utilizing single-mode coherence to generate and extract quantum entanglement.
  • The findings have implications for quantum information processing and the engineering of quantum resources.