Zobrazeno 1 - 10
of 81
pro vyhledávání: '"McLaren, Melanie"'
Autor:
McLaren, Melanie
Thesis (PhD)--Stellenbosch University, 2014.
ENGLISH ABSTRACT: High-dimensional quantum entanglement offers an increase in information capacity per photon; a highly desirable property for quantum information processes such as quantum communicati
ENGLISH ABSTRACT: High-dimensional quantum entanglement offers an increase in information capacity per photon; a highly desirable property for quantum information processes such as quantum communicati
Externí odkaz:
http://hdl.handle.net/10019.1/95868
Autor:
Ndagano, Bienvenu, Perez-Garcia, Benjamin, Roux, Filippus S., McLaren, Melanie, Rosales-Guzman, Carmelo, Zhang, Yingwen, Mouane, Othmane, Hernandez-Aranda, Raul I., Konrad, Thomas, Forbes, Andrew
High-dimensional entanglement with spatial modes of light promises increased security and information capacity over quantum channels. Unfortunately, entanglement decays due to perturbations, corrupting quantum links which cannot be repaired without a
Externí odkaz:
http://arxiv.org/abs/1605.05144
Autor:
Perez-Garcia, Benjamin, McLaren, Melanie, Goyal, Sandeep K., Hernandez-Aranda, Raul I., Forbes, Andrew, Konrad, Thomas
We propose an optical implementation of the Deutsch-Jozsa Algorithm using classical light in a binary decision-tree scheme. Our approach uses a ring cavity and linear optical devices in order to efficiently quarry the oracle functional values. In add
Externí odkaz:
http://arxiv.org/abs/1510.03365
Here we employ both dynamic and geometric phase control of light to produce radially modulated vector-vortex modes, the natural modes of optical fibers. We then measure these modes using a vector modal decomposition set-up as well as a tomography mea
Externí odkaz:
http://arxiv.org/abs/1505.00524
Given the multitude of applications of vector vortex beams there is a need for robust tools to measure them. Here we exploit the non-separability of such beams, akin to entanglement of quantum states, to apply tools traditionally associated with quan
Externí odkaz:
http://arxiv.org/abs/1502.02153
Autor:
Trichili, Abderrahmen, Mhlanga, Thandeka, Ismail, Yaseera, Roux, Filippus, McLaren, Melanie, Zghal, Mourad, Forbes, Andrew
We propose a simple method for the detection of Bessel beams with arbitrary radial and azimuthal indices, and then demonstrate it in an all-digital setup with a spatial light modulator. We confirm that the fidelity of the detection method is very hig
Externí odkaz:
http://arxiv.org/abs/1405.7533
Autor:
Mafu, Mhlambululi, Dudley, Angela, Goyal, Sandeep, Giovannini, Daniel, McLaren, Melanie, Padgett, Miles J., Konrad, Thomas, Petruccione, Francesco, Lütkenhaus, Norbert, Forbes, Andrew
Publikováno v:
Phys. Rev. A 88, 032305 (2013)
We present an experimental study of higher-dimensional quantum key distribution protocols based on mutually unbiased bases, implemented by means of photons carrying orbital angular momentum. We perform (d+1) mutually unbiased measurements in a classi
Externí odkaz:
http://arxiv.org/abs/1402.5810
The turbulence induced decay of orbital angular momentum (OAM) entanglement between two photons is investigated numerically and experimentally. To compare our results with previous work, we simulate the turbulent atmosphere with a single phase screen
Externí odkaz:
http://arxiv.org/abs/1306.6495
In this paper we consider geometrical two-photon optics of Bessel-Gaussian modes generated in spontaneous parametric down-conversion of a Gaussian pump beam. We provide a general theoretical expression for the orbital angular momentum (OAM) spectrum
Externí odkaz:
http://arxiv.org/abs/1306.2767
We report the first quantum entanglement experiment in South Africa. The spatial modes of the entangled photon pair are investigated with their potential for high-dimensional entanglement. The generation, measurement and characterisation of the entan
Externí odkaz:
http://arxiv.org/abs/1305.7102