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Journal of the Japan Association for Philosophy of Science

Entangled Photons (<Symposium> Quantum and Information)

Keiichi Edamatsu

Published Jan 1, 2009• 0 citations
Publisher

Abstract

Entanglement is not only a fascinating phenomena predicted by quantum mechanics but also an essential and practical resource of quantum information and communication technology. Photons are the most popular and promising media to generate, manipulate, and transmit the entanglement. In this review article, concepts and progress in the generation, observation, and characterization of entangled photons are presented.

DOI
10.4288/kisoron.36.1_35

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Entanglement is not only a fascinating phenomena predicted by quantum mechanics but also an essential and practical resource of quantum information and communication technology. Photons are the most popular and promising media to generate, manipulate, and transmit the entanglement. In this review article, concepts and progress in the generation, observation, and characterization of entangled photons are presented.
Entanglement is one of the essential resources of quantum information and communication technology. Photons are the most popular and promising media to manipulate entanglement. In this review article, concepts and progress in the generation, observation, and characterization of entangled photons are presented. Starting from underlying theoretical concepts, a historical review on the generation of entangled photons is given. Particularly, recent results on the generation of polarization-entangled photons from semiconductor sources are reviewed and discussed.
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Entanglement is one of the most fascinating properties of quantum mechanical systems; when two particles are entangled the measurement of the properties of one of the two allows the properties of the other to be instantaneously known, whatever the distance separating them. In parallel with fundamental research on the foundations of quantum mechanics performed on complex experimental set-ups, we assist today with bourgeoning of quantum information technologies bound to exploit entanglement for a large variety of applications such as secure communications, metrology and computation. Among the different physical systems under investigation, those involving photonic components are likely to play a central role and in this context semiconductor materials exhibit a huge potential in terms of integration of several quantum components in miniature chips. In this article we review the recent progress in the development of semiconductor devices emitting entangled photons. We will present the physical processes allowing the generation of entanglement and the tools to characterize it; we will give an overview of major recent results of the last few years and highlight perspectives for future developments.
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