Fundamental limitations in spontaneous emission rate of single-photon sources

Single photon production by rephased amplified spontaneous emission

The production of single photons using rephased amplified spontaneous emission is examined. This process produces single photons on demand with high efficiency by detecting the spontaneous emission from an atomic ensemble, then applying a population-inverting pulse to rephase the ensemble and produce a photon echo of the spontaneous emission events. The theoretical limits on the efficiency of t...

Single Photon Sources

Single and Entangled Photon Sources

This paper explores the fundamentals and applications of single and entangled photon sources. These sources are the ground works for advances in quantum communications, ranging from quantum cryptography to topics as peculiar as quantum teleportation. Single Photon Sources I. What is a Single Photon Source? A single photon source is an emitter of light that has all of its photons separated in ti...

Resonance energy transfer and spontaneous photon emission

The Perrin-Forster theory of sensitized fluorescence is extended by replacing the Coulomb interaction wth its relativistic counterpart, the Breit interaction. The transition matrix element is evaluated in a multipole expansion. The matrix element i s found to be modulated by the retardation factor eikR and to contain terms whch fall off only as l/R. The relation of these terms to spontaneous ph...

Single and Entangled Photon Sources

The possibility of totally secure communication through the application of quantum mechanical properties was introduced in 1984 by Bennett and Brassard in their paper, “Quantum Cryptography: Public Key Distribution and Coin Tossing”. As Bennett and Brassard outlined, quantum communication makes it impossible for an eavesdropper to intercept a message without detection by the desired parties. Th...