Reconfigurable quantum-optical circuits in a complex medium

Suraj Goel; Saroch Leedumrongwatthanakun; Natalia Herrera Valencia; Will McCutcheon; Armin Tavakoli; Claudio Conti; Pepijn W. H. Pinkse; Mehul Malik

doi:10.1117/12.3017036

10 June 2024 Reconfigurable quantum-optical circuits in a complex medium

Suraj Goel, Saroch Leedumrongwatthanakun, Natalia Herrera Valencia, Will McCutcheon, Armin Tavakoli, Claudio Conti, Pepijn W. H. Pinkse, Mehul Malik

Author Affiliations +

Proceedings Volume 12993, Quantum Technologies 2024; 129930B (2024) https://doi.org/10.1117/12.3017036
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Programmable optical circuits form a key part of quantum technologies today. As the size of such circuits is increased, maintaining precise control over every individual component becomes challenging. Here we show how embedding an optical circuit in the higher-dimensional space of a large mode-mixer allows us to forgo control over individual elements, while retaining a high degree of programmability over the circuit. Using this approach, we implement high-dimensional linear optical circuits within a commercial multi-mode fibre placed between controllable phase planes. We employ these circuits to manipulate high-dimensional entanglement in up to seven dimensions, demonstrating their application as fully programmable quantum gates. Furthermore, we show how these circuits turn the multi-mode fibre itself into a generalized multi-outcome measurement device, allowing us to both transport and certify entanglement. Finally, we show how a high circuit fidelity can be achieved with a low circuit depth by harnessing the resource of a high-dimensional mode-mixer. Our work serves as an alternative yet powerful approach for realizing precise control over high-dimensional quantum states of light.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Suraj Goel, Saroch Leedumrongwatthanakun, Natalia Herrera Valencia, Will McCutcheon, Armin Tavakoli, Claudio Conti, Pepijn W. H. Pinkse, and Mehul Malik "Reconfigurable quantum-optical circuits in a complex medium", Proc. SPIE 12993, Quantum Technologies 2024, 129930B (10 June 2024); https://doi.org/10.1117/12.3017036

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