We present an experiment regarding the CHSH inequality violation by single photons, thus concerning the failure of contextuality instead of locality in quantum physics. Single photons are generated by different sources (Laser, led and a halogen lamp). This experiment proves that it is possible to continuously pass from a quantum description of CHSH inequality violation, where violation...
Recently, single-photon states have been extensively employed as information carriers in several quantum information protocols. In this framework multiphoton interference plays a crucial role for the hardness of simulating bosons statistics, thus preventing a direct verification of multiphoton experiments. The latest results on Boson Sampling make available multiphoton states up to 20 photons....
Nitrogen-vacancy (NV)-doped nanodiamonds (NDs) have applications in quantum-sensing of temperature and magnetic fields. We succeded in ns laser-synthesis,from graphite, of fluorescent NV-NDs w/o any post-process activation as opposed to current production techniques. Proof of NDs formation is given by SAED, SEM and Raman spectroscopy. NV centers are probed by spectrally-resolved Optically...
In recent years semiconductor nanowires (NWs) for quantum technologies have been raising great interest, due to the development of quantum devices and detectors. Among them InAs and InAs-GaSb core shell NWs are of special interest as they are shown to be suitable as sensors, with applications in domains as detectors of radiation [1,2] and of chemical species [3], and can readily be fabricated...
The standard model of quantum computation aims to approximate an arbitrary unitary transformation using a universal set of quantum gates. While this approach has the advantage to detach the development of algorithms from a specific hardware implementation, it might still be quite impractical in the NISQ technology era. The Quantum Coherent Device group at LLNL is developing a quantum computing...
Silicon-photonic design capability is useful in implementing quantum communication apparata, where light-based data transfer is envisioned, or for quantum key distribution in quantum cryptography.
To this aim, PHOS4BRAIN is a project funded by INFN CSN5 to design and operate high-speed radiation hard links using Photonic Integrated circuits (PIC): custom-designed Mach-Zehnder Modulators...
Qu3D aims at designing and implementing quantum plenoptic cameras: radically novel 3D imaging devices exploiting both momentum-position entanglement and photon-number correlations to enable the typical refocusing and ultra-fast, scanning-free, 3D imaging capabilities of plenoptic devices, but with dramatically enhanced performances.
Qu3D merges scientific research and engineering for...
We illustrate the application of Quantum Computing techniques to the investigation of the thermodynamical properties of a simple system, made up of three
quantum spins with frustrated pair interactions and affected by a hard sign problem
when treated within classical computational schemes.
We show how quantum algorithms completely solve the problem, and discuss how
this can apply to more...
High-dimensional photonic quantum information promises considerable advantages compared to the two-dimensional qubit paradigm, from increased quantum communication rates to increased robustness for entanglement distribution. The QuICHE project aims to unlock the potential of high-dimensional quantum technology by encoding information in the spectral-temporal degrees of freedom of light. In...
We are forming a network of labs under the QUITPA (Quantum Information Transfer in Positronium Annihilation) acronym, to study quantum information transfer in positronium (Ps: bound state e+ e-) decay.
The pioneering study of correlation between the quantum numbers of Ps and theory-predicted entanglement of the polarization of its annihilation γs will be performed.
Present groups:
-Antimatter,...
The trend in particle physics experiment is to move the off-line analysis to real-time analysis and even to first-level trigger. The most powerful approach would be an hardware implement of machine learning techniques. Nowadays, this goal is limited by the computing power, power consumption and processing speed of traditional computing elements.
A novel approach is to use a neural network...
The talk is divided in three short sections:
1) A practical application: quantum tomography in x-ray medical apparata (project founded by CERN based on
2) A theoretical tool: the "quantum comb" (general method for optimisation of quantum circuits, algorithms, protocols, ...)
3) New foundations: “Information” as a paradigm for Quantum Theory and Quantum Field Theory.
