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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Two-photon quantum walk in a multimode fiber.

Hugo Defienne1, Marco Barbieri2, Ian A Walmsley3

  • 1Laboratoire Kastler Brossel, ENS-PSL Research University, CNRS, UPMC-Sorbonne Universités, Collège de France, 24 rue Lhomond, F-75005 Paris, France.

Science Advances
|May 7, 2016
PubMed
Summary
This summary is machine-generated.

Researchers demonstrated a quantum walk using photon pairs in a 380-mode fiber. This highly multimode platform enables advanced quantum simulation and computation by controlling multiphoton interference.

Keywords:
Random mediumTransmission matrixmultimode fiberphoton pairsquantum interferencesquantum walksscattering mediumspatial light modulatorwavefront shaping

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Photonics

Background:

  • Quantum walks are crucial for quantum simulation and universal quantum computation.
  • Developing complex quantum photonic networks is key for advancing these applications.
  • Indistinguishable photon pairs are essential for quantum interference experiments.

Purpose of the Study:

  • To implement a quantum walk of indistinguishable photon pairs in a highly multimode fiber.
  • To demonstrate control over multiphoton propagation and interference in a complex optical system.
  • To establish a versatile platform for high-dimensional multiport optical circuit programming.

Main Methods:

  • Utilized a multimode fiber supporting 380 modes for photon propagation.
  • Employed wavefront shaping techniques to control the two-photon state propagation.
  • Leveraged classical and quantum interference to excite arbitrary output modes.

Main Results:

  • Successfully implemented a quantum walk of photon pairs in a highly multimode fiber.
  • Demonstrated precise control over multiphoton interference through wavefront shaping.
  • Showcased the excitation of arbitrary output modes in the coupled system.

Conclusions:

  • This work presents a novel, highly multimode platform for multiphoton interference.
  • The developed method allows for programming general high-dimensional multiport optical circuits.
  • This research paves the way for next-generation photonic devices in quantum simulation, computing, and communication.