High-fidelity generation of four-photon GHZ states on-chip

Mutually entangled multi-photon states are at the heart of all-optical quantum technologies. While impressive progresses have 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

Orbital angular momentum based intra- and inter- particle entangled states generated via a quantum dot source

Engineering single-photon states endowed with Orbital Angular Momentum (OAM) is a powerful tool for quantum information photonic implementations. Indeed, thanks to its unbounded nature, OAM is suitable to encode qudits allowing a single carrier to transport a large amount of information. Nowadays, most of the experimental platforms use nonlinear crystals to generate single photons through … Leggi tutto

Quantifying n-photon indistinguishability with a cyclic integrated interferometer has been published in PRX!

A joint paper between IFN-CNR, CNRS and Sapienza on a new method for the quantification of n-photon indistinguishability has been published in PRX! We report on a universal method to measure the genuine indistinguishability of n-photons – a crucial parameter that determines the accuracy of optical quantum computing. Our approach relies on a low-depth cyclic … Leggi tutto

QuiX Quantum delivers a quantum photonic processor for Europe

QuiX Quantum, PHOQUSING partner and market leader in photonic quantum computing hardware, has realized the largest quantum photonic processor compatible with quantum dots for the European project PHOQUSING. The processor realized by QuiX Quantum is the core component of the quantum sampling machine that the project aims to realize. QuiX Quantum delivers a record-size 20-mode quantum photonic processor compatible with quantum … Leggi tutto

NEW DATES – Quantum Lab celebrates the first world quantum day, presenting the exhibition “Speak the unspeakable” within the Italian Quantum Weeks project.

UPDATE: New dates for the exhibition “Speak the unspeakable”. We look forward to meeting you from 11 to 13 April at the Museo Dell’Arte Classica at Sapienza Campus. Download the updated leaflet here Registration available here: https://sites.google.com/uniroma1.it/sapienzaquantumweeks The Italian Quantum Weeks brings together the national scientific community in quantum technologies intending to organize outreach events for … Leggi tutto

Experimental demonstration of an efficient, semi-device-independent photonic indistinguishability witness

PHOQUSING beneficiary QuiX Quantum, together with the University of Twente, published a new paper: “Experimental demonstration of an efficient, semi-device-independent photonic indistinguishability witness” Efficient and reliable measurements of photonic indistinguishability are crucial to solidify claims of a quantum advantage in photonics. Existing indistinguishability witnesses may be vulnerable to implementation loopholes, showing the need for a … Leggi tutto