Semi-Device-Independent Characterization of Multiphoton Indistinguishability
Multiphoton indistinguishability is a central resource for quantum enhancement in sensing and computation. Developing and certifying large-scale photonic devices requires reliable and accurate characterization of this resource, preferably using methods that are robust against experimental errors. Here, we propose a set of methods for the characterization of multiphoton indistinguishability, based on measurements of bunching and photon-number variance. Our methods are robust in a semi-device-independent way, in the sense of being effective even when the interferometers are incorrectly dialed. We demonstrate the effectiveness of this approach using an advanced photonic platform comprising a quantum dot single-photon source and a universal fully programmable integrated photonic processor. Our results show the practical usefulness of our methods, providing robust certification tools that can be scaled up to larger systems.
Authors
- Nicolò Spagnolo (ORCID: https://orcid.org/0000-0003-3471-2252)
- Francesco Ceccarelli (ORCID: https://orcid.org/0000-0001-9574-2899)
- Taira Giordani (ORCID: https://orcid.org/0000-0001-7111-0272)
- Fabio Sciarrino (ORCID: https://orcid.org/0000-0003-1715-245X)
- Leonardo Novo (ORCID: https://orcid.org/0000-0001-5428-2902)
- Niki Di Giano (ORCID: https://orcid.org/0009-0002-0263-8115)
- Ernesto F. Galvão (ORCID: https://orcid.org/0000-0003-2582-9918)
- Francesco Hoch (ORCID: https://orcid.org/0000-0001-6589-6651)
- Alessia Suprano (ORCID: https://orcid.org/0000-0003-2989-8881)
- Carlos Tavares (ORCID: https://orcid.org/0000-0002-3822-3168)
- Gonzalo Carvacho (ORCID: https://orcid.org/0000-0003-4465-3401)
- Giacomo Corrielli (ORCID: https://orcid.org/0000-0002-1329-8972)
- Marco Gardina
- Roberto Osellame (ORCID: https://orcid.org/0000-0002-4457-9902)
- Giovanni Rodari (ORCID: https://orcid.org/0000-0002-6056-4583)
- Serena Di Giorgio (ORCID: https://orcid.org/0000-0002-4719-1663)
- Riccardo Albiero (ORCID: https://orcid.org/0000-0002-4561-7640)
- Eugenio Caruccio
Institutions
- Universidade Federal Fluminense (BR)
- University of California, San Francisco (US)
- European Physical Society (FR)
- Enthought (United States) (US)
- Istituto di Fotonica e Nanotecnologie (IT)
- International Iberian Nanotechnology Laboratory (PT)
- Consorzio Roma Ricerche (IT)
- Electronic Product Services (Czechia) (CZ)
- Sapienza University of Rome (IT)
- Politecnico di Milano (IT)
Publication Details
- Journal
- PRX Quantum
- Published
- 2025-05-30
- DOI
- https://doi.org/10.1103/prxquantum.6.020340
- Citations
- 3
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 7.44
Funders
- Seventh Framework Programme