126 citations · 849 across the 22 of their papers we have counts for
22 papers
Nature abhors macroscopic superpositions
Filippus S. Roux
Superpositions of mass distributions can potentially lead to entanglement with the geometry of spacetime. Here we show that there exists a natural reluctance for macroscopic mass d…
Teleportation scheme for the complete state of light at the example of coherent states
Tanita Permaul, Arijit Dutta, Filippus S. Roux +1
We present a scheme to teleport both the spatial and number-of-photons degrees of freedom of light. This is achieved by teleportation of each pixel of a target image. We take coher…
Quantum transport of high-dimensional spatial information with a nonlinear detector
Bereneice Sephton, Adam Vallés, Isaac Nape +6
Information exchange between two distant parties, where information is shared without physically transporting it, is a crucial resource in future quantum networks. Doing so with hi…
Superoscillations: a scale physics perspective
Thomas Konrad, Filippus S. Roux
Arguments from scale physics, augmented by numerical and analytical investigations, are used to consider the probability and the detectability of superoscillations in generic funct…
Spatial mode detection by frequency upconversion
Bereneice Sephton, Adam Vallés, Fabian Steinlechner +4
The efficient creation and detection of spatial modes of light has become topical of late, driven by the need to increase photon-bit-rates in classical and quantum communications.…
A versatile quantum walk resonator with bright classical light
Bereneice Sephton, Angela Dudley, Gainluca Ruffato +7
In a Quantum Walk (QW) the "walker" follows all possible paths at once through the principle of quantum superposition, differentiating itself from classical random walks where one…
Turbulence and the Hong-Ou-Mandel effect
Shashi Prabhakar, Chemist Mabena, Thomas Konrad +1
The effect of a decoherence channel, such as a turbulent atmosphere, on the second order quantum interference in the Hong-Ou-Mandel (HOM) effect is investigated. The investigation…
Simultaneous entanglement swapping of multiple orbital angular momentum states of light
Yingwen Zhang, Megan Agnew, Thomas Roger +5
Entanglement swapping generates remote quantum correlations between particles that have not interacted and is the cornerstone of long-distance quantum communication, quantum networ…
Hong-Ou-Mandel interference of entangled Hermite-Gauss modes
Yingwen Zhang, Filippus S. Roux, Ebrahim Karimi +1
Hong-Ou-Mandel (HOM) interference is demonstrated experimentally for entangled photon pairs in the Hermite-Gauss (HG) basis. We use two Dove prisms in one of the paths of the photo…
Process tomography of quantum channels using classical light
Bienvenu Ndagano, Benjamin Perez-Garcia, Filippus S. Roux +7
High-dimensional entanglement with spatial modes of light promises increased security and information capacity over quantum channels. Unfortunately, entanglement decays due to pert…
Experimentally observed decay of higher-dimensional entanglement through turbulence
Yingwen Zhang, Shashi Prabhakar, Alpha Hamadou Ibrahim +3
The evolution of high dimensional entanglement in atmospheric turbulence is investigated. We study the effects of turbulence on photonic states generated by spontaneous parametric…
Implementation of multidimensional quantum walks using linear optics and classical light
Sandeep K. Goyal, Filippus S. Roux, Andrew Forbes +1
Classical optics can be used to efficiently implement certain quantum information processing tasks with a high degree of control, for example, one-dimensional quantum walks through…
Controlled generation of higher-order Poincare sphere beams from a laser
Darryl Naidoo, Filippus Roux, Angela Dudley +4
The angular momentum state of light can be described by positions on a higher-order Poincaré (HOP) sphere, where superpositions of spin and orbital angular momentum states give ris…
Experimental orbital angular momentum based quantum key distribution through turbulence
Sandeep Goyal, Alpha Hamadou Ibrahim, Filippus S. Roux +2
Using an experimental setup that simulates a turbulent atmosphere, we study the secret key rate for quantum key distribution protocols in orbital angular momentum based free space…
Detection of Bessel beams with digital axicons
Abderrahmen Trichili, Thandeka Mhlanga, Yaseera Ismail +4
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 modul…
Angular acceleration with twisted light
Christian Schulze, Filippus S. Roux, Angela Dudley +3
There is significant interest in tailoring wave packets that transversely accelerate during propagation. The first realisation was in the optical domain, the Airy beam. Valid in th…
Orbital angular momentum entanglement in turbulence
Alpha Hamadou Ibrahim, Filippus S. Roux, Melanie McLaren +2
The turbulence induced decay of orbital angular momentum (OAM) entanglement between two photons is investigated numerically and experimentally. To compare our results with previous…
Two-photon optics of Bessel-Gaussian modes
Melanie McLaren, Jacquiline Romero, Miles J. Padgett +2
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 t…
Realising high-dimensional quantum entanglement with orbital angular momentum
Melanie McLaren, Filippus S. Roux, Andrew Forbes
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 entan…
Qudit-Teleportation for photons with linear optics
Sandeep K Goyal, Patricia E. Boukama-Dzoussi, Sibasish Ghosh +2
Quantum Teleportation, the transfer of the state of one quantum system to another without direct interaction between both systems, is an important way to transmit information encod…
Implementing Quantum Walks Using Orbital Angular Momentum of Classical Light
Sandeep K Goyal, Filippus S Roux, Andrew Forbes +1
We present an implementation scheme for a quantum walk in the orbital angular momentum space of a laser beam. The scheme makes use of a ring interferometer, containing a quarter-wa…
Entangled Bessel beams
Melanie McLaren, Megan Agnew, Jonathan Leach +3
Orbital angular momentum (OAM) entanglement is investigated in the Bessel-Gauss (BG) basis. Having a readily adjustable radial scale, BG modes provide a more favourable basis for O…