7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

Quantum Optics: Do we need single photons?

10 Jul 2014, 10:00
D Les 310

D Les 310

Oral Presentation Track E - Physics Education Education


Ms Melanie McLaren (CSIR)

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Main supervisor (name and email)<br>and his / her institution

Prof. Andrew Forbes, aforbes1@csir.co.za, CSIR

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

An experimental measurement of quantum entanglement requires three crucial components: a non-linear crystal to generate entangled photons, avalanche photo-diodes to detect the single photons and a coincidence counter to measure the arrival of a photon pair. These components are not commonly found in an average South African optics laboratory and together with the presumed complexity of quantum theory, the undergraduate experiment course has become quantum-free. Internationally, however, quantum optics labs are receiving ever increasing attention as ground-breaking experiments, such as quantum teleportation, quantum key distribution protocols and quantum computing, are continually being realised. We can prevent ourselves from falling further behind in these technologies, but the solution is not additional funding, the solution is classical light. We show that using simple geometrical optics, the two-photon quantum correlations can be predicted using classical light. This means complex quantum experiments such as quantum ghost imaging can be simulated with only a diode laser, general optical components and a detector.

Primary author


Prof. Andrew Forbes (CSIR)

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