Heralding Single Photons from Pulsed Parametric Down-Conversion

We describe an experiment in which photon pairs from a pulsed parametric down-conversion source were coupled into single-mode fibers. Detecting one of the photons heralded the presence of the other photon in its fiber with a probability of 83%. The heralded photons were then used in a simple multi-photon interference experiment to illustrate their potential for quantum information applications.Comment: 4 pages, 7 figures. Version 2 has minor revision

Tailoring Single and Multiphoton Probabilities of a Single Photon On-Demand Source

As typically implemented, single photon sources cannot be made to produce single photons with high probability, while simultaneously suppressing the probability of yielding two or more photons. Because of this, single photon sources cannot really produce single photons on demand. We describe a multiplexed system that allows the probabilities of producing one and more photons to be adjusted independently, enabling a much better approximation of a source of single photons on demand.Comment: 4 pages, LaTex, 2 figures, twocolumn and RevTex Style for PR

Use of SMS texts for facilitating access to online alcohol interventions: a feasibility study

A41 Use of SMS texts for facilitating access to online alcohol interventions: a feasibility study In: Addiction Science & Clinical Practice 2017, 12(Suppl 1): A4

The small towns of Roman Britain An analysis of their structural and functional complexity

SIGLEAvailable from British Library Lending Division - LD:D55544/85 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Themes for urban research, c 100 BC to AD 200

CBA working party reportAvailable from British Library Document Supply Centre-DSC:98/02263 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo