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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Photonic nonlinearities via quantum Zeno blockade.

Yu-Zhu Sun¹, Yu-Ping Huang, Prem Kumar

¹Center for Photonic Communication and Computing and Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3112, USA.

Physical Review Letters

|June 18, 2013

Summary

Researchers achieved single-photon nonlinear optical effects using quantum Zeno blockade. This enables deterministic phase gates between single photons with high fidelity in lithium-niobate microresonators, advancing all-optical applications.

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Area of Science:

Quantum optics
Nonlinear optics
Photonics

Background:

Achieving optical-nonlinear effects at the single-photon level is a significant challenge due to fundamental and practical limitations.
Existing methods struggle to control and manipulate individual photons for nonlinear interactions.

Purpose of the Study:

To present a novel approach for realizing single-photon level optical-nonlinear effects.
To demonstrate the feasibility of deterministic quantum gates using these effects.

Main Methods:

Exploiting the quantum Zeno blockade phenomenon in nonlinear optical systems.
Utilizing a lithium-niobate microresonator as the experimental platform.

Main Results:

A deterministic phase gate was realized between single photons.
The gate achieved near-unity fidelity, indicating high precision and reliability.
The approach is supported by established fabrication and operation techniques for microresonators.

Conclusions:

The quantum Zeno blockade offers a viable pathway to overcome challenges in single-photon nonlinear optics.
This method provides a powerful tool for developing all-optical applications in both classical and quantum information processing.
The use of lithium-niobate microresonators makes the approach experimentally accessible and scalable.