4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

Classical light simulations of quantum measurements

6 Jul 2016, 16:10
1h 50m
Kramer Law building

Kramer Law building

UCT Middle Campus Cape Town
Board: C.371
Poster Presentation Track C - Photonics Poster Session (2)

Speaker

Mr Gareth Berry (Structured Light Lab, School of Physics, University of the Witwatersrand)

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

Prof. Andrew Forbes, andrew.forbes@wits.ac.za, University of the Witwatersrand

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

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>

Quantum entanglement has been at the forefront of multiple interesting studies since the release of Einstein, Podolsky and Rosen’s famous paper in 1935. Its uses have extended to fields such as cryptography, teleportation and quantum imaging. The process of creating entangled bi-photon relies on a non-linear process called spontaneous parametric down conversion (SPDC). In SPDC a single photon is split into two entangled daughter photons, a process in which both energy and momentum are conserved. While SPDC has become a standard technique in generating entangled photon pairs, alignment and measurements of single photons is not a simple procedure. As such, classical light in the visible wavelength regime is used to not only align the entanglement system, but can also be used to simulate quantum measurements. This technique is known as back-projection and relies on both the conservation laws of SPDC as well as Snell’s law. This technique simplifies an otherwise complex quantum system and offers a simple experimental system for predicting quantum behaviour. We illustrate this through various quantum measurements such as a Bell inequality and a full state tomography. The validity of this classical approach is highlighted in an experimental demonstration of quantum imaging.

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No

Primary author

Mr Gareth Berry (Structured Light Lab, School of Physics, University of the Witwatersrand)

Co-authors

Prof. Andrew Forbes (CSIR) Dr Melanie McLaren (Wits)

Presentation Materials

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