Publication by UNIROMA1, CNR and CNRS “High-fidelity four-photon GHZ states on chip”

Mutually entangled multi-photon states are at the heart of all-optical quantum technologies. While impressive progress has been reported in the generation of such quantum light states using free space apparatus, high-fidelity high-rate on-chip entanglement generation is crucial for future scalability. In this work, we use a bright quantum-dot based single-photon source to demonstrate the high … Leggi tutto

Italian Quantum Weeks, 13-18 April 2024

Quantum Lab is pleased to announce the 2024 edition of the Italian Quantum Weeks (https://quantumweeks.it) exhibition “Speak the Unspeakable: A Journey into Quantum Mechanics” to be held at the Botanical Garden of Rome from 13 to 19 April. The event is organized in collaboration with the Department of Physics, the Museum of Physics and the … Leggi tutto

LIN INL: “Measuring relational information between quantum states, and applications”

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

Un cloud quantistico sicuro: da oggi è possibile proteggere la privacy di gruppi di utenti che effettuano calcoli contemporaneamente su server distanti

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

PHOQUSING Workshop, 28-30 November 2023

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:

Multi-client distributed blind quantum computation with the Qline architecture

Qline

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

LIN INL article “Quantum circuit compilation and hybrid computation using Pauli-based computation”

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

LIN INL: “Enhanced bunching of nearly indistinguishable bosons”, published on arXiv!

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

New article from the collaboration Sapienza, Sorbonne, VeriQloud “Multi-client distributed blind quantum computation with the Qline architecture”

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