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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

Electro-optically switchable spatial-mode entangled photon pairs using a modified Mach-Zehnder interferometer.

Jasleen Lugani¹, Sankalpa Ghosh, Krishna Thyagarajan

¹Department of Physics, IIT Delhi, New Delhi, India. jaslphy@gmail.com

|September 4, 2012

Summary

This summary is machine-generated.

We developed a switchable integrated optical waveguide device that generates spatial-mode entangled photon pairs. This device allows on-demand switching between different entangled states, advancing quantum information processing.

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Area of Science:

Quantum optics
Integrated photonics
Quantum information science

Background:

Entangled photon pairs are crucial for quantum information processing.
Integrated photonic devices offer miniaturization and scalability for quantum technologies.
Spatial-mode entanglement provides a unique degree of freedom for quantum information encoding.

Purpose of the Study:

To propose and analyze a novel switchable integrated optical waveguide device.
To demonstrate the generation of nondegenerate, maximally spatial-mode entangled photon pairs.
To achieve on-demand switching between different spatial-mode entangled states.

Main Methods:

Utilizing a modified Mach-Zehnder interferometer.
Incorporating an integrated electro-optic phase modulator.
Analyzing the switching capability between Φ+ and Ψ+ entangled states.

Main Results:

Successful generation of nondegenerate, maximally spatial-mode entangled photon pairs.
Demonstration of on-demand switching between Φ+ and Ψ+ spatial-mode entangled states.
Validation of the device's versatility in manipulating spatial-mode degrees of freedom.

Conclusions:

The proposed device offers a versatile platform for integrated quantum information processing.
The ability to switch spatial-mode entanglement is key for advanced quantum protocols.
This work paves the way for realizing complex integrated optical chips for quantum applications.