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Related Experiment Videos

Tunable spatial decoherers for polarization-entangled photons.

Graciana Puentes1, Dirk Voigt, Andrea Aiello

  • 1Huygens Laboratory, Leiden University, Leiden, The Netherlands. graciana@molphys.leidenuniv.nl

Optics Letters
|June 14, 2006
PubMed
Summary

Researchers developed a controllable spatial decoherence source for twin photons using wedge depolarizers. This method enables the creation of tunable mixed states and the synthesis of Werner-like states on demand.

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Area of Science:

  • Quantum optics
  • Photonics
  • Quantum information science

Background:

  • Entangled photon states are crucial for quantum information processing.
  • Controlling decoherence is essential for manipulating quantum states.

Purpose of the Study:

  • To introduce a novel, controllable source of spatial decoherence for twin photons.
  • To demonstrate the conversion of a polarization-entangled singlet state into a tunable mixed state.
  • To synthesize Werner-like states using spatial decoherence.

Main Methods:

  • Utilizing commercially available wedge depolarizers as a spatial decoherence source.
  • Employing quantum tomography for full characterization of the mixed state.

Main Results:

Related Experiment Videos

  • Successfully created a tunable mixed state from a polarization-entangled singlet state.
  • Demonstrated the synthesis of Werner-like states on demand.
  • Validated the effectiveness of wedge depolarizers for controlled spatial decoherence.

Conclusions:

  • A novel and controllable method for spatial decoherence in twin photons has been established.
  • Wedge depolarizers offer a practical tool for generating tunable mixed states.
  • This technique facilitates the on-demand synthesis of specific quantum states like Werner states.