Dipartimento di Fisica Sapienza Università di Roma
Inferring causal relations from empirical data is a central task in any scientific inquiry. To that aim, a mathematical theory of causality has been developed, not only stating under which conditions such inference becomes possible but also offering a formal framework to reason about cause and effect within quantum theory. This perspective article provides an … Continua a leggere
Classical machine learning algorithms can provide insights on high-dimensional processes that are hardly accessible with conventional approaches. As a notable example, t-distributed Stochastic Neighbor Embedding (t-SNE) represents the state of the art for visualization of data sets of large dimensionality. An interesting question is then if this algorithm can provide useful information also in quantum … Continua a leggere
Multiparameter estimation is a general problem that aims at measuring unknown physical quantities, obtaining high precision in the process. In this context, the adoption of quantum resources promises a substantial boost in achievable performances with respect to the classical case. However, several open problems remain to be addressed in the multiparameter scenario. A crucial requirement … Continua a leggere
Bosonic interference is a fundamental physical phenomenon, and it is believed to lie at the heart of quantum computational advantage. It is thus necessary to develop practical tools to witness its presence, both for a reliable assessment of a quantum source and for fundamental investigations. Here we describe how linear interferometers can be used to … Continua a leggere
The paper has been highlighted in Nature Photonics! Structured photons are nowadays an important resource in classical and quantum optics due to the richness of properties they show under propagation, focusing, and in their interaction with matter. Vectorial modes of light in particular, a class of modes where the polarization varies across the beam profile, … Continua a leggere
The difficulty of validating large-scale quantum devices, such as boson samplers, poses a major challenge for any research program that aims to show quantum advantages over classical hardware. Towards this aim, we propose a novel data-driven approach, wherein models are trained to identify common pathologies using unsupervised machine-learning methods. We illustrate this idea by training … Continua a leggere
The capability to generate and manipulate quantum states in high-dimensional Hilbert spaces is a crucial step for the development of quantum technologies, from quantum communication to quantum computation. One-dimensional quantum walk dynamics represents a valid tool in the task of engineering arbitrary quantum states. Here we affirm such potential in a linear-optics platform that realizes … Continua a leggere
This conference will address recent theoretical and experimental developments in quantum measurement, underscoring common themes from the perspectives of foundations of quantum mechanics, quantum information processing, quantum optics, condensed matter physics and metrology. (Link) Topics Foundations of quantum mechanics Quantum measurement in information processing Quantum measurements in nanodevices Quantum measurement and thermodynamics Quantum metrology and … Continua a leggere
Valerio Di Giulio Title: Strong coupling in electron-matter interactions ICFO- The Institute of Photonic Sciences Matteo Pompili Title: Towards a multi-node network with NV centers in diamond Delft University of Technology Francesco Graffitti Title: Enabling new quantum technologies via source-engineering technique Heriot-Watt University, UK Giulia Rubino Title: Secure communication by quantum superimposing insecure channels University … Continua a leggere
N. Viggianiello, F. Flamini, M. Bentivegna, N. Spagnolo, A. Crespi, D. J. Brod, E. F. Galvao, R. Osellame, F. Sciarrino, Optimal photonic indistinguishability tests in multimode networks, Sci. Bull. 63, 1470-1478 (2018).