Quantum state processing through controllable synthetic temporal photonic lattices
Quantum walks on photonic platforms represent a physics-rich framework for quantum measurements, simulations and universal computing. Dynamic reconfigurability of photonic circuitry is key to controlling the walk and retrieving its full operation potential. Universal quantum processing schemes based on time-bin encoding in gated fibre loops have been proposed but not demonstrated yet, mainly due to gate inefficiencies. Here we present a scalable quantum processor based on the discrete-time quantum walk of time-bin-entangled photon pairs on synthetic temporal photonic lattices implemented on a coupled fibre-loop system. We utilize this scheme to path-optimize quantum state operations, including the generation of two- and four-level time-bin entanglement and the respective two-photon interference. The design of the programmable temporal photonic lattice enabled us to control the dynamic of the walk, leading to an increase in the coincidence counts and quantum interference measurements without recurring to post-selection. Our results show how temporal synthetic dimensions can pave the way towards efficient quantum information processing, including quantum phase estimation, Boson sampling and the realization of topological phases of matter for high-dimensional quantum systems in a cost-effective, scalable and robust fibre-based setup.
Authors
- Rosario Lo Franco (ORCID: https://orcid.org/0000-0002-3281-0935)
- Riza Fazili (ORCID: https://orcid.org/0000-0001-9938-9949)
- Roberto Morandotti (ORCID: https://orcid.org/0000-0001-7717-1519)
- Stefania Sciara (ORCID: https://orcid.org/0000-0002-4740-9343)
- William J. Munro (ORCID: https://orcid.org/0000-0003-1835-2250)
- Agnes George
- Арстан Бисянов (ORCID: https://orcid.org/0000-0002-6516-1636)
- André Luiz Marques Muniz (ORCID: https://orcid.org/0000-0003-3253-3154)
- Farzam Nosrati (ORCID: https://orcid.org/0000-0002-0372-4114)
- Mario Chemnitz (ORCID: https://orcid.org/0000-0002-8340-7214)
- Ulf Peschel (ORCID: https://orcid.org/0000-0002-3980-9224)
- Monika Monika
Institutions
- Okinawa Institute of Science and Technology Graduate University (JP)
- Leibniz Institute of Photonic Technology (DE)
- Institut National de la Recherche Scientifique (CA)
- Fraunhofer Institute for Applied Optics and Precision Engineering (DE)
- Friedrich Schiller University Jena (DE)
- University of Palermo (IT)
- Technische Universität Braunschweig (DE)
Publication Details
- Journal
- Nature Photonics
- Published
- 2024-10-14
- DOI
- https://doi.org/10.1038/s41566-024-01546-4
- Citations
- 18
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 6.25
Funders
- Deutsche Forschungsgemeinschaft
- Ministero dell’Istruzione, dell’Università e della Ricerca
- Mitacs
- Ministero dell'Università e della Ricerca
- Natural Sciences and Engineering Research Council of Canada
- Japan Society for the Promotion of Science
- Fonds de recherche du Québec – Nature et technologies