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Updated: Aug 9, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Filtering out photonic Fock states
Kaoru Sanaka1, Kevin J Resch, Anton Zeilinger
1Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, 1090 Vienna, Austria.
Physical Review Letters
|April 12, 2006
Summary
Researchers demonstrate a novel quantum filter for photon number states using measurement-induced nonlinearity. This filter enables probabilistic generation of optical nonlinearities in linear-optical networks, a feat impossible with classical optics alone.
Area of Science:
- Quantum optics
- Nonlinear optics
Background:
- Linear-optical networks typically exhibit linear responses to light.
- Generating optical nonlinearities often requires complex materials or high light intensities.
- Probabilistic phenomena in quantum mechanics offer new avenues for optical control.
Purpose of the Study:
- To introduce a highly controllable quantum filter for photon number states.
- To leverage measurement-induced amplitude nonlinearity for quantum applications.
- To demonstrate multiphoton nonclassical interference in linear-optical networks.
Main Methods:
- Utilizing a linear-optical network with specific measurement outcomes.
- Implementing a quantum filter based on measurement-induced nonlinearity.
- Demonstrating interference effects for one- and two-photon states across various beam splitter reflectivities.
Main Results:
- Achieved probabilistic generation of unprecedented optical nonlinearities.
- Showcased a quantum filter for photon number states with high controllability.
- Demonstrated that conditional transmission probability can be higher for two-photon states than one-photon states, a nonlinear effect.
Conclusions:
- Measurement-induced nonlinearity in linear-optical networks provides a novel method for generating optical nonlinearities.
- The demonstrated quantum filter offers precise control over photon number states.
- This work opens possibilities for advanced quantum information processing and optical technologies.
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