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09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
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Quantum nonlinear optics with single photons enabled by strongly interacting atoms.
Thibault Peyronel1, Ofer Firstenberg, Qi-Yu Liang
1Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Nature
|July 27, 2012
Summary
Researchers created a novel medium enabling strong interactions between individual photons. This breakthrough allows for quantum-by-quantum control of light, advancing optical science and quantum technologies.
Area of Science:
- Quantum optics
- Atomic physics
- Optical engineering
Background:
- Achieving strong nonlinear interactions between individual photons is a major challenge in optical science.
- Conventional materials exhibit negligible nonlinearity at the single-photon level.
Purpose of the Study:
- To demonstrate a medium with quantum nonlinearity at the single-photon level.
- To enable quantum-by-quantum control of light fields.
Main Methods:
- Coherently coupling slow-moving photons to strongly interacting atomic Rydberg states.
- Utilizing a cold, dense atomic gas as the nonlinear medium.
Main Results:
- Demonstrated a medium that is nonlinear at the single-photon level.
- Observed strong absorption of photon pairs while maintaining transparency to single photons.
Conclusions:
- The developed medium exhibits quantum nonlinearity, enabling new light-matter interactions.
- This work opens possibilities for single-photon switching, quantum logic, and many-body states of light.
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