Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Light Science & Applications

Quantum topology emerges at near field

Zhenyu Guo, Yijie Shen

Published May 8, 2026• 0 citations
Publisher

Abstract

Mapping the total angular momentum of light bound to nanophotonic structures enables the creation of single-photon states with rich topological textures. This approach opens new opportunities for generating high-dimensional entanglement and provides a promising route toward robust quantum information processing.
DOI
10.1038/s41377-026-02319-0

Related papers

The hidden topology in orbital angular momentum entanglement

Andrew Forbes, Isaac M. Nape, Pedro Ornelas +1 more

We harness orbital angular momentum (OAM) to discover a rich tapestry of topological maps in high dimensional spaces, moving beyond spin textured fields with mixed degrees of freedom to topologies using only the OAM of light. We confirm this experimentally using quantum states with an underlying topology of 48 dimensions and a topological spectrum spanning over 17000 maps, an encoding alphabet with enormous potential. We show that the topological spectrum allows the simultaneous ability to be robust to and probe for perturbation, the latter made possible by observing emergent signatures in the non-topological (trivial) spaces of the spectrum. We outline how our work opens exciting future possibilities for quantum sensing and communications.

Complex Light and Optical Forces•Mar 5, 2026•0 citations

Encoding quantum information on near-field photons using total angular momentum

Shai Tsesses, Amit Kam, Yigal Ilin +11 more

We encode quantum information on photons confined to surface using a new degree-of-freedom unique to the near-field regime – Total angular momentum. We observe photon-pair non-classical correlations on-chip, as well as single-photon polarization-mode entanglement in free-space.

Frontiers in Optics•Jan 1, 2025•0 citations

Nonlinear Optics for High Dimensional Quantum States in Nanophotonics

Liat Nemirovsky-Levy, Amit Kam, Meir Lederman +4 more

We propose a nonlinear process to selectively project and create high-dimensional quantum states (qudits) in a nanophotonic chip. To do that, we employ nonlinearity to control near-field modes carrying angular momentum.

•Jan 1, 2025•0 citations

Quantum structured light takes shape

Andrew Forbes

Quantum structured light offers a roadmap to high-dimensional and multi-dimensional quantum states by exploiting all of light’s many degrees of freedom at the quantum level. In this talk, I will review the recent progress in quantum entanglement of photons in their spatial degree of freedom: quantum structured light. I will explain how to create high-dimensional quantum states in the laboratory, how to measure them, and review the present state of the art in the field. I will show how the patterns can be abstracted, mixing degrees of freedom to produce quantum topologies in light, introducing new paradigms for quantum state observables and classification. Finally, I will outline the advantages and disadvantages of using such single photon and entangled states in real-world applications, offering a perspective on the present challenges and exciting opportunities in the field.

Complex Light and Optical Forces•Mar 19, 2025•0 citations

Topological Quantum Photonics

Andrea Blanco‐Redondo

We review our experiments on the generation and propagation of quantum states of light in topological nanophotonic platforms, specifically, topological protection of biphoton states and path entanglement, and entanglement of different topologies.

Microoptics Conference•Sep 24, 2023•0 citations

Quantum skyrmion parallelism via metasurface-tailored high-dimensional entanglement

Pedro Ornelas, Ramona Bedford, Fazilah Nothlawala +6 more

Quantum skyrmions are topological structures that have garnered significant interest due to their demonstrated robustness and versatility across diverse optical platforms. However, existing approaches for their generation are limited to producing pre-determined two dimensional qubit states with a single topology. Here we create multi-dimensional topological states by introducing a non-local interaction between high-dimensional photonic entanglement and a metasurface, where the topological transformation induced by the metasurface is made non-deterministic by the probabilistic nature of the interfacing entangled state. Within this framework, we demonstrate that individual quantum states can host multiple co-existing topologies that are only revealed upon measurement, allowing for their parallel transport within distinct spatial mode channels. We confirm this by revealing the rich topological landscape within our modified Hilbert space while controlling the desired output topology by orbital angular momentum (OAM) projections on one of the entangled photons, producing multiple non-local polarization-OAM entangled states characterized by distinct topological classes, all from a single metasurface device. Our results reveal new capability when structured high-dimensional entanglement is interfaced with structured matter capable of coupling photonic degrees of freedom, establishing a new pathway for the compact generation of complex quantum states.

quant-pharXiv:2608.25415•Aug 27, 2026•0 citations
We harness orbital angular momentum (OAM) to discover a rich tapestry of topological maps in high dimensional spaces, moving beyond spin textured fields with mixed degrees of freedom to topologies using only the OAM of light. We confirm this experimentally using quantum states with an underlying topology of 48 dimensions and a topological spectrum spanning over 17000 maps, an encoding alphabet with enormous potential. We show that the topological spectrum allows the simultaneous ability to be robust to and probe for perturbation, the latter made possible by observing emergent signatures in the non-topological (trivial) spaces of the spectrum. We outline how our work opens exciting future possibilities for quantum sensing and communications.
Quantum structured light offers a roadmap to high-dimensional and multi-dimensional quantum states by exploiting all of light’s many degrees of freedom at the quantum level. In this talk, I will review the recent progress in quantum entanglement of photons in their spatial degree of freedom: quantum structured light. I will explain how to create high-dimensional quantum states in the laboratory, how to measure them, and review the present state of the art in the field. I will show how the patterns can be abstracted, mixing degrees of freedom to produce quantum topologies in light, introducing new paradigms for quantum state observables and classification. Finally, I will outline the advantages and disadvantages of using such single photon and entangled states in real-world applications, offering a perspective on the present challenges and exciting opportunities in the field.
Quantum skyrmions are topological structures that have garnered significant interest due to their demonstrated robustness and versatility across diverse optical platforms. However, existing approaches for their generation are limited to producing pre-determined two dimensional qubit states with a single topology. Here we create multi-dimensional topological states by introducing a non-local interaction between high-dimensional photonic entanglement and a metasurface, where the topological transformation induced by the metasurface is made non-deterministic by the probabilistic nature of the interfacing entangled state. Within this framework, we demonstrate that individual quantum states can host multiple co-existing topologies that are only revealed upon measurement, allowing for their parallel transport within distinct spatial mode channels. We confirm this by revealing the rich topological landscape within our modified Hilbert space while controlling the desired output topology by orbital angular momentum (OAM) projections on one of the entangled photons, producing multiple non-local polarization-OAM entangled states characterized by distinct topological classes, all from a single metasurface device. Our results reveal new capability when structured high-dimensional entanglement is interfaced with structured matter capable of coupling photonic degrees of freedom, establishing a new pathway for the compact generation of complex quantum states.