“Entanglement of photons in their dual waveparticle nature” just published in Nature Communications

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

“What Hong-Ou-Mandel interference says on two-photon frequency entanglement” published in Scientific Reports

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” just published in Physical Review Letters with Editor Suggestion

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