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Quantum Logic with Cavity Photons From Single Atoms.
Annemarie Holleczek1, Oliver Barter1, Allison Rubenok2
1University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
Physical Review Letters
|July 23, 2016
Summary
Researchers demonstrate quantum logic with narrow linewidth photons from a single Rubidium-87 atom. This breakthrough enables advanced quantum technology using integrated photonics and single photon sources.
Area of Science:
- Quantum optics
- Atomic physics
- Integrated photonics
Background:
- Single photon sources are crucial for quantum information processing.
- Integrated photonics offers a scalable platform for quantum technologies.
Purpose of the Study:
- To demonstrate quantum logic using narrow linewidth photons.
- To entangle photons using a controlled-not gate on a photonic chip.
- To explore the potential of integrated quantum photonics with single atom sources.
Main Methods:
- Producing narrow linewidth photons from a single Rubidium-87 atom coupled to a high-finesse cavity.
- Implementing a controlled-not gate within an integrated photonic chip.
- Measuring nonclassical correlations between photon detection events.
Main Results:
- Successfully generated narrow linewidth photons via a nonprobabilistic scheme.
- Achieved entanglement of photons using the integrated photonic chip.
- Observed nonclassical correlations with significant temporal separation.
Conclusions:
- The study demonstrates a viable method for quantum logic using integrated photonics and single atom sources.
- This work paves the way for advanced quantum technologies by combining narrow-band single photon sources and integrated quantum circuits.
- The observed long-range correlations highlight the potential for robust quantum communication and computation.
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