Quantum Lab

Wave-particle duality is the most fundamental description of the nature of a quantum object, which behaves like a classical particle or wave depending on the measurement apparatus. On the other hand, entanglement represents nonclassical correlations of composite quantum systems, being also a key resource in quantum information. Despite the very recent observations of wave-particle superposition … Continua a leggere

Here we put forward some considerations on how Hong-Ou-Mandel interferometry provides signatures of frequency entanglement in the two-photon state produced by parametric down-conversion. We find that some quantitative information can be inferred in the limit of long-pulse pumping, while the short-pulse limit remains elusive. Marco Barbieri, Emanuele Roccia, Luca Mancino, Marco Sbroscia, Ilaria Gianani and … Continua a leggere

Optimal Measurements for Simultaneous Quantum Estimation of Multiple Phases The conditions for simultaneous quantum estimation of multiple parameters are derived, a desired step forward for the design of future quantum imaging and metrology devices. Luca Pezzè, Mario A. Ciampini, Nicolò Spagnolo, Peter C. Humphreys, Animesh Datta, Ian A. Walmsley, Marco Barbieri, Fabio Sciarrino, and Augusto … Continua a leggere

We propose and demonstrate a new scheme for the violation of bilocality that does not require shared reference frames. Enjoy the reading… Experimental bilocality violation without shared reference frames. F. Andreoli, G. Carvacho, L. Santodonato, M. Bentivegna, R. Chaves, F. Sciarrino [arXiv:1705.03309]

In this letter we tackle one of the key difficulties of multiphase estimation: obtaining a measurement which saturates the fundamental sensitivity bounds.. Enjoy the reading… Optimal measurements for simultaneous quantum estimation of multiple phases. L.Pezzè, M.A. Ciampini, N. Spagnolo, P.C. Humphreys, A. Datta, I.A. Walmsley, M. Barbieri, F. Sciarrino, A. Smerzi [arXiv:1705.03687]

The European Commission has selected for funding the project “CAPABLE” submitted by Dr. Roberto Osellame, Senior Researcher at the Istituto di Fotonica e Nanotecnologie (IFN) of the Consiglio Nazionale delle Ricerche (CNR). The project has been funded within the European Research Council-ERC Advanced grant 2017 Call. As co-beneficiary, the Quantum Information Lab will be directly … Continua a leggere

A new article of the team on Nature Communications! Enjoy the reading… G. Carvacho, F. Andreoli, L. Santodonato, M. Bentivegna, R. Chaves, F. Sciarrino. “Experimental violation of local causality in a quantum network”, Nature Communications 8, 14775 (2017)

Dal 13 al 15 marzo, la Sapienza partecipa alle celebrazioni promosse dall’Agenzia Esecutiva del Consiglio Europeo della Ricerca in occasione del 10° anniversario di ERC, organizzando la “Sapienza ERC Week”, che prevede una serie di eventi rivolti sia alla comunità scientifica che al grande pubblico. ERC workshop per il Panel Physics and Engineering Martedì 14 … Continua a leggere

We show the new phenomenon of “wave-particle duality action at a distance” in an all-optical experiment which generates for the first time a quantum entanglement of photons in their dual wave and particle nature. The complementarity principle does a further step ahead! Enjoy the reading… A. S. Rab, E. Polino, Z.-X. Man, N. B. An, Y.-J. … Continua a leggere

On 16 February 2017, Fulvio Flamini has successfully defended his PhD theses entitled “Implementation of integrated photonic experiments towards scalable quantum technologies” under the supervision of Fabio Sciarrino.