288 citations · 1.1k across the 41 of their papers we have counts for
23 papers · 1 filter
Quantum skyrmion parallelism via metasurface-tailored high-dimensional entanglement
Pedro Ornelas, Ramona Bedford, Fazilah Nothlawala +6
Quantum skyrmions are topological structures that have garnered significant interest due to their demonstrated robustness and versatility across diverse optical platforms. However,…
Orthogonalised Self-Guided Quantum Tomography: Insights from Single-Pixel Imaging
Kiki Dekkers, Alice Ruget, Fazilah Nothlawala +6
We introduce the concept of self-guided imaging (SGI) as a linear analogue of self-guided quantum tomography (SGQT). We show that SGI is mathematically equivalent to single-pixel i…
Reconfigurable circuit for mode tunable topological quantum structured light
Pedro Ornelas, Tatjana Kleine, André G. de Oliveira +3
Structured light in the quantum regime has garnered considerable attention due to the opportunities it offers when mixing light's internal degrees of freedom, for high-dimensional…
Topological robustness of orbital angular momentum entanglement in stochastic channels
Tatjana Kleine, Pedro Ornelas, Cade Peters +5
Orbital angular momentum (OAM) entanglement gives access to multiple qubit and high dimensional Hilbert spaces, but is unfortunately susceptible to disturbance, decaying in real-wo…
Remote engineering of particle-like topologies to visualise entanglement dynamics
Fazilah Nothlawala, Bereneice Sephton, Pedro Ornelas +6
Skyrmions are a particle-like topology with a quantised skyrmion number, realised across condensed matter and photonic platforms alike. In quantum photonics, they constitute an eme…
Towards reconstructing quantum structured light on a quantum computer
Mwezi Koni, Shawal Kassim, Paola C. Obando +2
We introduce a variational quantum computing approach for quantum state reconstruction within a discretized logical framework, using experimental measurement data as input. By mapp…
Unveiling the link between quantum ghost imaging and Grover's quantum searching algorithm
Neelan Gounden, Fazilah Nothlawala, Paola C. Obando +3
Photonic quantum technologies have become pivotal in the implementation of communication, imaging and computing modalities. Among these applications, quantum ghost imaging (GI) exp…
Orbital angular momentum of entangled photons as a probe for relativistic effects
Fazilah Nothlawala, Kiki Dekkers, Moslem Mahdavifar +3
Orbital angular momentum (OAM) as both classical and quantum states of light has proven essential in numerous applications, from high-capacity information transfer to enhanced prec…
On-chip photon entanglement-assisted topology loading and transfer
Haoqi Zhao, Yichi Zhang, Isaac Nape +6
Topological protection offers a robust solution to the challenges of noise and loss in physical systems. By integrating topological physics into optics, loading and encoding quantu…
Dual-wavelength quantum skyrmions from liquid crystal topological defect
Mwezi Koni, Fazilah Nothlawala, Vagharshak Hakobyan +3
We propose a spin-orbit strategy for generating dual-wavelength quantum skyrmions, realized either as entangled photon pairs at dual wavelengths or as heralded single-photon states…
The topological spectrum of high dimensional quantum states
Robert de Mello Koch, Pedro Ornelas, Neelan Gounden +3
Topology has emerged as a fundamental property of many systems, manifesting in cosmology, condensed matter, high-energy physics and waves. Despite the rich textures, the topology h…
Quantum Skyrmions in general quantum channels: topological noise rejection and the discretization of quantum information
Robert de Mello Koch, Bo-Qiang Lu, Pedro Ornelas +2
The topology of a pure state of two entangled photons is leveraged to provide a discretization of quantum information. Since discrete signals are inherently more resilient to the e…
Emulating quantum computing with optical matrix multiplication
Mwezi Koni, Hadrian Bezuidenhout, Isaac Nape
Optical computing harnesses the speed of light to perform vector-matrix operations efficiently. It leverages interference, a cornerstone of quantum computing algorithms, to enable…
Topological rejection of noise by quantum skyrmions
Pedro Ornelas, Isaac Nape, Robert De Mello Koch +1
An open challenge in the context of quantum information processing and communication is improving the robustness of quantum information to environmental contributions of noise, a s…
Non-local Skyrmions as topologically resilient quantum entangled states of light
Pedro Ornelas, Isaac Nape, Robert de Mello Koch +1
In the early 1960s, inspired by developing notions of topological structure, Tony Skyrme suggested that sub-atomic particles be described as natural excitations of a single quantum…
Revealing the embedded phase in single pixel quantum ghost imaging
Bereneice Sephton, Isaac Nape, Chané Moodley +2
We outline and experimentally demonstrate a method to image pure phase objects using traditional quantum ghost imaging with single pixel detectors. We provide a theoretical descrip…
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…
Experimental quantum secret sharing with spin-orbit structured photons
Michael de Oliveira, Isaac Nape, Jonathan Pinnell +2
Secret sharing allows three or more parties to share secret information which can only be decrypted through collaboration. It complements quantum key distribution as a valuable res…
Multi-dimensional entanglement transport through single-mode fibre
Jun Liu, Isaac Nape, Qianke Wang +3
The global quantum network requires the distribution of entangled states over long distances, with significant advances already demonstrated using entangled polarisation states, re…
Self-healing high-dimensional quantum key distribution using hybrid spin-orbit Bessel states
Isaac Nape, Eileen Otte, Adam Vallés +4
Using spatial modes for quantum key distribution (QKD) has become highly topical due to their infinite dimensionality, promising high information capacity per photon. However, spat…
A hybrid quantum eraser scheme for characterization of free-space and fiber communication channels
Isaac Nape, Charlotte Kyeremah, Adam Vallés +3
We demonstrate a simple projective measurement based on the quantum eraser concept that can be used to characterize the disturbances of any communication channel. Quantum erasers a…
Erasing the orbital angular momentum information of a photon
Isaac Nape, Bienvenu Ndagano, Andrew Forbes
Quantum erasers with paths in the form of physical slits have been studied extensively and proven instrumental in probing wave-particle duality in quantum mechanics. Here we replac…
High-bit-rate quantum key distribution with entangled internal degrees of freedom of photons
Isaac Nape, Bienvenu Ndagano, Benjamin Perez-Garcia +4
Quantum communication over long distances is integral to information security and has been demonstrated in free space and fibre with two-dimensional polarisation states of light. A…