Research topics

List of publications

Bell Nonlocality and device-independent certification

The "violation of Bell inequalities" is the observation that conclusively proves that the results of some measurements are not pre-established. This foundational observation has an applied side: it can be used to certify quantum devices in a "device-independent" way, that is, without having to describe which measurements are being performed on which physical systems.

Valerio was one of those who first made this observation back in 2007. Since, we have not stopped contributing to this field. After some years helping to certify randomness, we have focused on the remarkable possibility of "self-testing": in some cases, the observation is compatible with a unique quantum description in terms of states and measurements.

In 2019, Valerio has published a reference treatise on Bell Nonlocality.

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Quantum devices

This expression usually refers to QKD setups, random number generators, and of course quantum computers. For the study and certification of those, see above. But we are also looking at devices with different functionalities: thermodynamical functionalities (engines and refrigerators), or even quantum replacements for basic optical devices (mirrors, cavities).

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Going to larger systems

This is going to be the focus for the future. The big question is that of the Heisenberg cut: it is really movable at will? And can we contribute to experiments that push quantum coherence towards bigger and bigger systems? These are very ambitious questions. We shall build up from two previous pieces of work: