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

Quantum channel tomography with classical light

5 Jul 2016, 14:40
20m
2A (Kramer Law building)

2A

Kramer Law building

UCT Middle Campus Cape Town
Oral Presentation Track G - Theoretical and Computational Physics Theoretical and Computational Physics (1)

Speaker

Mr Bienvenu Ndagano (University of the Witwatersrand)

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

Yes

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

No

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>

Entanglement is a salient feature of quantum mechanics, summarizing the correlations between systems which cannot be described independently; the state of the composite system cannot be expressed as a product state of its constituents. This non-separable property is however not unique to quantum systems; in fact, classes of classical electromagnetic fields have long been known to exhibit entanglement properties: here, the entanglement is between degrees of freedom rather than individual photons. We thus pose the question: given a classically entangled field, can one make predictions about the dynamics of quantum entangled photons, subject to perturbations in a given channel? Our findings are two folds: on one hand we show that classically entangled fields can accurately model the dynamics of quantum entangled systems, particularly the decay of entanglement resulting perturbations of the quantum state leading to decoherence. On the other hand, again using classical fields, we prove the Choi-Jamiolkowski isomorphism which, for quantum systems, states that the complete channel information can be obtained from a state tomography of the maximally entangled states, acted upon by the channel operator.

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

MSc

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

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

Primary author

Mr Bienvenu Ndagano (University of the Witwatersrand)

Co-authors

Prof. Andrew Forbes (University of the Witwatersrand) Mr Benjamin Perez-Garcia (Tecnologico de Monterrey) Dr Carmelo Rosales-Guzman (University of the Witwatersrand) Dr Melanie McLaren (University of the Witwatersrand) Prof. Thomas Konrad (UKZN) Dr Yingwen Zhang (CSIR National Laser Centre)

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