jean The geometrical arrangement of a set of quantum states can be completely characterized using relational information only. This information is encoded in the pairwise state overlaps, as well as in Bargmann invariants of higher degree written as traces of products of density matrices. We describe how to measure Bargmann invariants using suitable generalizations of the … Leggi tutto
Universal photonic processors (UPPs) are fully programmable photonic integrated circuits that are key components in quantum photonics. With this work, we present a novel platform for the realization of low-loss, low-power, and high-fidelity UPPs based on femtosecond laser writing (FLW) and compatible with a large wavelength spectrum. In fact, we demonstrate different UPPs, tailored for … Leggi tutto
Un gruppo di ricerca internazionale ha ideato e dimostrato che è possibile effettuare calcoli da remoto su processori quantistici mantenendo intatta la privacy di tutti gli utenti coinvolti. I risultati dell’esperimento, condotto presso il Quantum Lab dell’Università Sapienza di Roma, sono stati pubblicati sulla rivista Nature Communications e costituiscono un passo in avanti fondamentale verso … Leggi tutto
The PHOQUSING workshop, held at Sorbonne Université, just ended. Approx 30 participants had been involved in fruitful discussions and new plans. List of speakers: Gonzalo Carvacho Giovanni Corrielli Beatrice Polacchi Dominik Leichtle Chin-Te Liao Léo Monbroussou Ernesto Galvão Bo Yang Mina Doosti Programme:
Universal blind quantum computing allows users with minimal quantum resources to delegate a quantum computation to a remote quantum server, while keeping intrinsically hidden input, algorithm, and outcome. State-of-art experimental demonstrations of such a protocol have only involved one client. However, an increasing number of multi-party algorithms, e.g. federated machine learning, require the collaboration of … Leggi tutto
In a recently published piece of work funded by PHOQUSING, PhD student Filipa Peres and PHOQUSING PI Ernesto Galvão, both from INL, explore a universal model of quantum computation known as Pauli-based computation. They show that this model can be used to compile quantum circuits dominated by Clifford gates, demonstrating helpful quantum resource savings in … Leggi tutto
In multiphon interference processes, the commonly assumed direct link between boson bunching and particle indistinguishability has recently been challenged in Seron et al. [Nat. Photon. 17, 702 (2023)]. Exploiting the connection between optical interferometry and matrix permanents, it appeared that bunching effects may surprisingly be enhanced in some interferometers by preparing specific states of partially distinguishable photons. … Leggi tutto
At the 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), in Munich, Francesco Ceccarelli and Riccardo Albiero presented:– Femtosecond-Laser Written Universal Photonic Processors– Multiport Cyclic Interferometer For Genuine n-photon Indistinguishability Assessment. .
Universal blind quantum computing allows users with minimal quantum resources to delegate a quantum computation to a remote quantum server, while keeping intrinsically hidden input, algorithm, and outcome. State-of-art experimental demonstrations of such a protocol have only involved one client. However, an increasing number of multi-party algorithms, e.g. federated machine learning, require the collaboration of … Leggi tutto
Short (4-min) video by PhD student Filipa Peres on a preprint funded by PHOQUSING: https://www.youtube.com/watch?v=uIkEHjM1FLg&ab_channel=InternationalIberianNanotechnologyLaboratory Article: F.C.R. Peres, E.F. Galvão. Quantum circuit compilation and hybrid computation using Pauli-based computation (2022), [arXiv:2203.01789]