Squeezed light enables quantum-enhanced phase estimation, with crucial applications in both fundamental physics and emerging technologies. To fully exploit the advantage provided by this approach, estimation protocols must remain optimal across the entire parameter range and resilient to instabilities in the probe state. In this context, strategies that rely on pre-calibrated squeezing levels are vulnerable … Continua a leggere

A Gaussian boson sampler (GBS) is a special-purpose quantum computer that can be practically realized at a large scale in optics. Here we report on experiments in which we used a frequency-multiplexed GBS with > 400 modes as a quantum reservoir. We evaluated the accuracy of our GBS-based reservoir computer on a variety of benchmark … Continua a leggere

Quantum machine learning algorithms have very recently attracted significant attention in photonic platforms. In particular, reconfigurable integrated photonic circuits offer a promising route, thanks to the possibility of implementing adaptive feedback loops, which are an essential ingredient for achieving the necessary nonlinear behavior characteristic of neural networks. Here, we implement a quantum reservoir computing protocol … Continua a leggere

In June 2026, Fabio Sciarrino joined the International School of Physics ‘Enrico Fermi’ in Varenna, Lake COmmo, as a lecturer. The course covered topics in the quantum dynamics and quantum communication.

A Bernoulli factory is a model for randomness manipulation that transforms an initial Bernoulli random variable into another Bernoulli variable by applying a predetermined function relating the output bias to the input one. In literature, quantum-to-quantum Bernoulli factory schemes have been proposed, which encode both the input and output variables using qubit amplitudes. This fundamental … Continua a leggere

Taira Giordani, researcher at Quantum Lab of the Department of Physics oat Sapienza University of Rome, is among the six winners of the 24th edition of the L’Oréal-UNESCO “For Women in Science” Young Talents Italy Award. Each year, the program awards six prizes worth €20,000 to support the work of young female scientists under the … Continua a leggere

Bosonic bunching is a term used to describe the well-known tendency of bosons to bunch together, and which differentiates their behavior from that of fermions or classical particles. However, in some situations, perfectly indistinguishable bosons may counter-intuitively bunch less than classical, distinguishable particles. Here, we report two such counter-intuitive multiphoton bunching effects observed with three … Continua a leggere

To assess the capabilities of photonic quantum systems, it is essential to develop analytical and experimental methods for probing the underlying optical dynamics. Here, we investigate fundamental constraints arising when multi-photon states evolve through a quantum linear optical network, showing how such limitations can be overcome when introducing measurement-induced nonlinearities. Specifically, we analyze bounds related … Continua a leggere

Quantum Lab announces a new scientific publication by T. Giordani, G. Zanfardino, L. Leuzzi, E. Bonfissuto, E. Caruccio, G. Gasbarri, M. Bossi, A. Rajan, R. Albiero, F. Ceccarelli, N. Spagnolo, R. Santagati, S. Paesani, M. Leonetti, R. Osellame, G. Parisi, G. Ruocco, F. Illuminati and F. Sciarrino. The article, entitled “Observation of associative-memory retrieval and … Continua a leggere