European Photonic Quantum Computer

Project Information

EPIQUE

Grant agreement ID: 101135288

DOI

10.3030/101135288

EC signature date 15 November 2023

Start date 1 January 2024

End date 31 December 2026

Funded under

• Digital, Industry and Space

Total cost

€ 10 340 741,50

EU contribution

€ 10 340 741,50

Coordinated by

UNIVERSITA DEGLI STUDI DI ROMA LA SAPIENZA
Italy

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Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .

Deliverables

Websites, patent fillings, videos etc. (1)

Project Logo and Website

A dedicated logo and website regularly updated with project results, publications, outreach activities, deliverables, etc

Demonstrators, pilots, prototypes (4)

Special-purpose laser source for high clock rate pulsed squeezing

Target parameters: 1 GHz repetition rate, 300 ps pulses (switchable to continuous-wave operation), ~1 W peak power at 775 nm, 100 mW at 1550 nm

Demonstrator of a 70% efficient source of indistinguishable photons

Fabrication of 70% bright source of indistinguishable single photons based on optimised cavity and excitation scheme

Simulation and proof of principle device of a detector array

Simulation showing number of pixels needed to achieve required specifications and a demonstration of first pixelated detector in cryostat

Fast and low-loss optical switch demonstrator

A demonstrator of an optical switch with switching time <10 ns, with internal loss <0.5 dB will be provided

Documents, reports (3)

Benchmarks for photonic quantum information processing

Report on photonic analogues of randomized benchmarking and quantum volume to assess power of photonic quantum processors

Report on hardware requirements for small-scale demonstrations of the models studied in Task 5.1, involving limited or no adaptivity

Study on characteristics and hardware requirements of computational models promising for near-term photonic devices: non-adaptive measurement-based quantum computation, sampling and variational algorithms

Report on engineered quantum light sources

Summary report on the generation of pulsed two-mode squeezing with picosecond pulses

Publications

Peer reviewed articles (14)

Photonic Source of Heralded Greenberger-Horne-Zeilinger States

Author(s): H. Cao, L. M. Hansen, F. Giorgino, L. Carosini, P. Zahálka, F. Zilk, J. C. Loredo, P. Walther
Published in: Physical Review Letters, Issue 132, 2025, ISSN 0031-9007
Publisher: American Physical Society (APS)
DOI: 10.1103/PHYSREVLETT.132.130604

Purifying Photon Indistinguishability through Quantum Interference

Author(s): Carlos F. D. Faurby, Lorenzo Carosini, Huan Cao, Patrik I. Sund, Lena M. Hansen, Francesco Giorgino, Andrew B. Villadsen, Stefan N. van den Hoven, Peter Lodahl, Stefano Paesani, Juan C. Loredo, Philip Walther
Published in: Physical Review Letters, Issue 133, 2025, ISSN 0031-9007
Publisher: American Physical Society (APS)
DOI: 10.1103/PHYSREVLETT.133.033604

Deterministic and reconfigurable graph state generation with a single solid-state quantum emitter

Author(s): H. Huet, P. R. Ramesh, S. C. Wein, N. Coste, P. Hilaire, N. Somaschi, M. Morassi, A. Lemaître, I. Sagnes, M. F. Doty, O. Krebs, L. Lanco, D. A. Fioretto, P. Senellart
Published in: Nature Communications, Issue 16, 2025, ISSN 2041-1723
Publisher: Springer Science and Business Media LLC
DOI: 10.1038/S41467-025-59693-3

Quantum machine learning with Adaptive Boson Sampling via post-selection

Author(s): Francesco Hoch, Eugenio Caruccio, Giovanni Rodari, Tommaso Francalanci, Alessia Suprano, Taira Giordani, Gonzalo Carvacho, Nicolò Spagnolo, Seid Koudia, Massimiliano Proietti, Carlo Liorni, Filippo Cerocchi, Riccardo Albiero, Niki Di Giano, Marco Gardina, Francesco Ceccarelli, Giacomo Corrielli, Ulysse Chabaud, Roberto Osellame, Massimiliano Dispenza, Fabio Sciarrino
Published in: Nature Communications, Issue 16, 2025, ISSN 2041-1723
Publisher: Springer Science and Business Media LLC
DOI: 10.1038/S41467-025-55877-Z

A logical implication between two conjectures on matrix permanents

Author(s): Léo Pioge, Kamil K. Pietrasz, Benoit Seron, Leonardo Novo, Nicolas J. Cerf
Published in: Linear Algebra and its Applications, 2025, ISSN 0024-3795
Publisher: Elsevier BV
DOI: 10.1016/J.LAA.2025.07.011

Laser-written reconfigurable photonic integrated circuit directly coupled to a single-photon avalanche diode array

Author(s): Giulio Gualandi, Simone Atzeni, Marco Gardina, Antonino Caime, Giacomo Corrielli, Ivan Labanca, Angelo Gulinatti, Ivan Rech, Roberto Osellame, Giulia Acconcia, Francesco Ceccarelli
Published in: Light: Science &amp; Applications, Issue 14, 2025, ISSN 2047-7538
Publisher: Springer Science and Business Media LLC
DOI: 10.1038/S41377-025-01854-6

A logical implication between two conjectures on matrix permanents

Author(s): Léo Pioge, Kamil K. Pietrasz, Benoit Seron, Leonardo Novo, Nicolas J. Cerf
Published in: Linear Algebra and its Applications, Issue 725, 2025, ISSN 0024-3795
Publisher: Elsevier BV
DOI: 10.1016/J.LAA.2025.07.011

A Spin-Optical Quantum Computing Architecture

Author(s): Grégoire de Gliniasty, Paul Hilaire, Pierre-Emmanuel Emeriau, Stephen C. Wein, Alexia Salavrakos, Shane Mansfield
Published in: Quantum, Issue 8, 2024, ISSN 2521-327X
Publisher: Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften
DOI: 10.22331/Q-2024-07-24-1423

Experimental aspects of indefinite causal order in quantum mechanics

Author(s): Lee A. Rozema; Teodor Strömberg; Huan Cao; Yu Guo; Bi-Heng Liu; Philip Walther
Published in: Nature Reviews Physics, 2024, ISSN 2522-5820
Publisher: Springer Nature Limited
DOI: 10.48550/arxiv.2405.00767

Experimental validation of boson sampling using detector binning

Author(s): Malaquias Correa Anguita, Anita Camillini, Sara Marzban, Marco Robbio, Benoît Seron, Leonardo Novo, Jelmer J Renema
Published in: Quantum Science and Technology, 2025, ISSN 2058-9565
Publisher: IOP Publishing
DOI: 10.1088/2058-9565/ADECBC

Quantum interferences and gates with emitter-based coherent photon sources

Author(s): I. Maillette de Buy Wenniger, S. C. Wein, D. Fioretto, S. E. Thomas, C. Antón-Solanas, A. Lemaître, I. Sagnes, A. Harouri, N. Belabas, N. Somaschi, P. Hilaire, J. Senellart, P. Senellart
Published in: Optica Quantum, Issue 2, 2024, ISSN 2837-6714
Publisher: Optica Publishing Group
DOI: 10.1364/OPTICAQ.527420

Error-mitigated photonic quantum circuit Born machine

Author(s): Alexia Salavrakos, Tigran Sedrakyan, James Mills, Shane Mansfield, Rawad Mezher
Published in: Physical Review A, Issue 111, 2025, ISSN 2469-9926
Publisher: American Physical Society (APS)
DOI: 10.1103/PHYSREVA.111.L030401

Nature Communications

Author(s): N. Margaria, F. Pastier, T. Bennour, M. Billard, E. Ivanov, W. Hease, P. Stepanov, A. F. Adiyatullin, R. Singla, M. Pont, M. Descampeaux, A. Bernard, A. Pishchagin, M. Morassi, A. Lemaître, T. Volz, V. Giesz, N. Somaschi, N. Maring, S Boissier, T. Au, P.
Published in: Nature Communications, Issue 7553, 2025, ISSN 2041-1723
Publisher: Nature Publishing Group
DOI: 10.48550/ARXIV.2410.07760

Photonic parameter-shift rule: Enabling gradient computation for photonic quantum computers

Author(s): Axel Pappalardo, Pierre-Emmanuel Emeriau, Giovanni de Felice, Brian Ventura, Hugo Jaunin, Richie Yeung, Bob Coecke, Shane Mansfield
Published in: Physical Review A, Issue 111, 2025, ISSN 2469-9926
Publisher: American Physical Society (APS)
DOI: 10.1103/PHYSREVA.111.032429