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Related Experiment Video

Updated: May 9, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Implementing quantum walks using orbital angular momentum of classical light.

Sandeep K Goyal1, Filippus S Roux, Andrew Forbes

  • 1School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa. goyal@ukzn.ac.za

Physical Review Letters
|July 16, 2013
PubMed
Summary
This summary is machine-generated.

We demonstrate a novel quantum walk implementation using laser beam orbital angular momentum. This classical system allows real-time observation of quantum walk dynamics.

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Last Updated: May 9, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Published on: May 30, 2014

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

  • Quantum optics
  • Laser physics
  • Quantum information science

Background:

  • Quantum walks are fundamental to quantum computation and simulation.
  • Implementing quantum walks typically requires complex quantum systems.
  • Controlling orbital angular momentum (OAM) in light offers new avenues for quantum information processing.

Purpose of the Study:

  • To present a practical implementation scheme for quantum walks.
  • To utilize the orbital angular momentum (OAM) space of a laser beam for quantum walks.
  • To enable real-time observation of quantum walk evolution.

Main Methods:

  • Utilizing a ring interferometer with a quarter-wave plate and a q-plate.
  • Employing non-classical entanglement between laser polarization and OAM.
  • Implementing an arbitrary number of quantum walk steps through the optical setup.

Main Results:

  • A classical optical setup successfully implements a quantum walk.
  • The scheme allows for an adjustable number of quantum walk steps.
  • Real-time observation of the quantum walk dynamics is achieved.

Conclusions:

  • This scheme provides a scalable and observable platform for quantum walk research.
  • The use of OAM in classical optics offers a promising approach for quantum information tasks.
  • The real-time observation capability facilitates understanding and development of quantum walk algorithms.