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| Natura: | Preprint |
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2026
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| Accesso online: | https://arxiv.org/abs/2604.06528 |
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| author | Malik, Mehul Kues, Micheal Ikuta, Takuya Takesue, Hiroki Bajoni, Daniele Moss, David J. Morandotti, Roberto Forbes, Andrew Walborn, Stephen Karimi, Ebrahim Ding, Yunhong Paesani, Stefano Vigliar, Caterina Brecht, Benjamin Silberhorn, Christine Bouchard, Frédéric Karpiński, Michał Sussman, Benjamin Lukens, Joseph M. Bromberg, Yaron Fickler, Robert Giordani, Taira Sciarrino, Fabio Zheng, Yun Wang, Jianwei Huber, Marcus Tavakoli, Armin Uola, Roope Brunner, Nicolas Friis, Nicolai Valencia, Natalia Herrera Romero, Jacquiline McCutcheon, Will |
| author_facet | Malik, Mehul Kues, Micheal Ikuta, Takuya Takesue, Hiroki Bajoni, Daniele Moss, David J. Morandotti, Roberto Forbes, Andrew Walborn, Stephen Karimi, Ebrahim Ding, Yunhong Paesani, Stefano Vigliar, Caterina Brecht, Benjamin Silberhorn, Christine Bouchard, Frédéric Karpiński, Michał Sussman, Benjamin Lukens, Joseph M. Bromberg, Yaron Fickler, Robert Giordani, Taira Sciarrino, Fabio Zheng, Yun Wang, Jianwei Huber, Marcus Tavakoli, Armin Uola, Roope Brunner, Nicolas Friis, Nicolai Valencia, Natalia Herrera Romero, Jacquiline McCutcheon, Will |
| contents | The field of high-dimensional quantum photonics involves the use of multimode photonic degrees-of-freedom such as the spatial, temporal, or spectral structure of light to encode multi-level quantum states. Recent years have seen rapid progress in the development of methods to generate, manipulate, and distribute such quantum states of light and their use in a range of quantum technology applications that offer practical advantages over conventional qubit-based approaches. High-dimensional quantum states of light encoded in photonic time-bins, frequency-bins, transverse-spatial modes, waveguide paths, and temporal modes have enabled noise-robust fundamental tests of quantum mechanics, error-resilient and high-capacity quantum communication protocols, andas well as efficient approaches for quantum information processing, to name just a few examples. However, research in this field has progressed fairly independently, with little exchange across different photonic degrees-of-freedom or between experiment and theory and no comprehensive comparison between degrees-of-freedom. This roadmap aims to bridge this gap by surveying progress in each area and identifying shared challenges and opportunities that cut across two or more photonic degrees-of-freedoms. We review early work and state-of-the-art experimental techniques under development for high-dimensional quantum states encoded in single and entangled photons, as well as theoretical tools for their measurement and certification. We outline the main outstanding challenges for theory and each experimental degree-of-freedom, identifying promising future directions of research that may enable these to be overcome. We end by discussing interconnections and shared challenges centered around their distribution, measurement, and manipulation, with a view towards their integration into next-generation quantum technology platforms and applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_06528 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-Dimensional Quantum Photonics: Roadmap Malik, Mehul Kues, Micheal Ikuta, Takuya Takesue, Hiroki Bajoni, Daniele Moss, David J. Morandotti, Roberto Forbes, Andrew Walborn, Stephen Karimi, Ebrahim Ding, Yunhong Paesani, Stefano Vigliar, Caterina Brecht, Benjamin Silberhorn, Christine Bouchard, Frédéric Karpiński, Michał Sussman, Benjamin Lukens, Joseph M. Bromberg, Yaron Fickler, Robert Giordani, Taira Sciarrino, Fabio Zheng, Yun Wang, Jianwei Huber, Marcus Tavakoli, Armin Uola, Roope Brunner, Nicolas Friis, Nicolai Valencia, Natalia Herrera Romero, Jacquiline McCutcheon, Will Quantum Physics The field of high-dimensional quantum photonics involves the use of multimode photonic degrees-of-freedom such as the spatial, temporal, or spectral structure of light to encode multi-level quantum states. Recent years have seen rapid progress in the development of methods to generate, manipulate, and distribute such quantum states of light and their use in a range of quantum technology applications that offer practical advantages over conventional qubit-based approaches. High-dimensional quantum states of light encoded in photonic time-bins, frequency-bins, transverse-spatial modes, waveguide paths, and temporal modes have enabled noise-robust fundamental tests of quantum mechanics, error-resilient and high-capacity quantum communication protocols, andas well as efficient approaches for quantum information processing, to name just a few examples. However, research in this field has progressed fairly independently, with little exchange across different photonic degrees-of-freedom or between experiment and theory and no comprehensive comparison between degrees-of-freedom. This roadmap aims to bridge this gap by surveying progress in each area and identifying shared challenges and opportunities that cut across two or more photonic degrees-of-freedoms. We review early work and state-of-the-art experimental techniques under development for high-dimensional quantum states encoded in single and entangled photons, as well as theoretical tools for their measurement and certification. We outline the main outstanding challenges for theory and each experimental degree-of-freedom, identifying promising future directions of research that may enable these to be overcome. We end by discussing interconnections and shared challenges centered around their distribution, measurement, and manipulation, with a view towards their integration into next-generation quantum technology platforms and applications. |
| title | High-Dimensional Quantum Photonics: Roadmap |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.06528 |