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Creating single time-bin-entangled photon pairs.

Christoph Simon1, Jean-Philippe Poizat

  • 1Laboratoire de Spectrométrie Physique, CNRS-Université de Grenoble 1, St. Martin d'Hères, France.

Physical Review Letters
|February 9, 2005
PubMed
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Researchers demonstrate a method to create time-bin-entangled photon states using a single emitter and two phase-coherent pulses. This technique avoids double pair emission and enables indistinguishable photons for multiphoton interference, potentially creating multi-photon entangled states.

Area of Science:

  • Quantum optics
  • Atomic physics

Background:

  • Generating entangled photon states is crucial for quantum information processing.
  • Existing methods often face challenges with efficiency and scalability.

Purpose of the Study:

  • To develop a novel method for creating time-bin-entangled photon states from a single emitter.
  • To enable indistinguishable photons for multiphoton interference experiments.
  • To explore the direct creation of multi-photon entangled states.

Main Methods:

  • Exciting a single emitter with two phase-coherent pulses separated by a time delay.
  • Preparing the emitter in a metastable state to prevent double pair emission.
  • Ensuring indistinguishability of photons from separate emission events.

Related Experiment Videos

Main Results:

  • Successfully generated time-bin-entangled photon states.
  • Demonstrated the ability to make photons from separate emissions indistinguishable.
  • Showcased the potential for multiphoton interference using this method.

Conclusions:

  • The proposed method offers a viable route to generate time-bin-entangled photons.
  • This technique can be utilized for advanced quantum interference experiments.
  • The approach may be extended to create higher-order multi-photon entangled states.