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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Photon-photon gates in Bose-Einstein condensates.

Arnaud Rispe1, Bing He, Christoph Simon

  • 1Institute for Quantum Information Science and Department of Physics and Astronomy, University of Calgary, Calgary T2N 1N4, Alberta, Canada.

Physical Review Letters
|August 27, 2011
PubMed
Summary
This summary is machine-generated.

Scientists demonstrate storing light in Bose-Einstein condensates. They propose a method for a controlled phase gate between two stored photons, enabling quantum information processing with enhanced light-matter interactions.

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Area of Science:

  • Quantum optics
  • Atomic physics
  • Condensed matter physics

Background:

  • Recent advancements show light can be stored in Bose-Einstein condensates for extended durations (over 1 second).
  • Developing methods for controlling interactions between stored photons is crucial for quantum information processing.

Purpose of the Study:

  • To propose a method for implementing a controlled phase gate between two photons stored in a Bose-Einstein condensate.
  • To enhance photon-photon interactions for quantum gate operations.

Main Methods:

  • Storing photons in the ground state of the effective trapping potential within the Bose-Einstein condensate.
  • Utilizing enhanced collision-induced interactions by adiabatically increasing trapping frequency.
  • Employing a Feshbach resonance to further amplify interactions.

Main Results:

  • A controlled phase shift of π between two stored photons can be achieved.
  • The proposed method allows for gate operation within 1 second.

Conclusions:

  • The proposed method offers a viable route for realizing quantum gates with stored photons in Bose-Einstein condensates.
  • This work advances the potential for quantum memory and quantum information processing applications.