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

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Deterministic Down-Converter and Continuous Photon-Pair Source within the Bad-Cavity Limit.

Yue Chang¹, Alejandro González-Tudela¹, Carlos Sánchez Muñoz^1,2

¹Max-Planck Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany.

Physical Review Letters

|November 26, 2016

Summary

This study presents a cavity quantum electrodynamics setup for generating photon pairs, acting as a deterministic single-photon down-converter or an optimal two-photon source for quantum technologies.

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Area of Science:

Quantum optics
Quantum information science
Solid-state physics

Background:

N-photon sources are crucial for advancing quantum technologies.
Precise control over photon generation is a key challenge.

Purpose of the Study:

To propose and characterize a cavity quantum electrodynamics setup for generating photon pairs.
To identify operational regimes for deterministic single-photon conversion and optimal two-photon generation.

Main Methods:

Utilizing cavity quantum electrodynamics.
Employing scattering and master equation formalisms for system characterization.
Proposing a superconducting circuit implementation.

Main Results:

Identified regimes for deterministic single-photon down-conversion and optimal two-photon generation under weak driving.
Developed a physical criterion for antibunched two-photon sources.
Demonstrated non-trivial quantum correlations between outgoing photons.
Proposed a feasible superconducting circuit implementation.

Conclusions:

The proposed system offers a controllable platform for generating photon pairs.
The work advances the development of N-photon sources for quantum applications.
The setup is extendable for deterministic conversion of single photons into N photons.