Zobrazeno 1 - 10
of 2 133
pro vyhledávání: '"Gherardini, A."'
Autor:
Donelli, Beatrice, Gherardini, Stefano, Marino, Raffaele, Campaioli, Francesco, Buffoni, Lorenzo
We present a cooperative protocol to charge quantum spin networks up to the highest-energy configuration, in terms of the network's magnetization. The charging protocol leverages spin-spin interactions and the crossing of a phase transition's critica
Externí odkaz:
http://arxiv.org/abs/2410.22212
We study the geometry of the Gromoll-Meyer sphere, one of Milnor's exotic $7$-spheres. We focus on a Kaluza-Klein Ansatz, with a round $S^4$ as base space, unit $S^3$ as fibre, and $k=1,2$ $SU(2)$ instantons as gauge fields, where all quantities admi
Externí odkaz:
http://arxiv.org/abs/2410.01909
We apply a variety of machine learning methods to the study of Seiberg duality within 4d $\mathcal{N}=1$ quantum field theories arising on the worldvolumes of D3-branes probing toric Calabi-Yau 3-folds. Such theories admit an elegant description in t
Externí odkaz:
http://arxiv.org/abs/2409.15251
Autor:
Solinas, Paolo, Gherardini, Stefano
Quantum non-demolition measurements define a non-invasive protocol to extract information from a quantum system that we aim to monitor. They exploit an additional quantum system that is sequentially coupled to the system. Eventually, by measuring the
Externí odkaz:
http://arxiv.org/abs/2408.00088
Autor:
Bizzarri, Gabriele, Gherardini, Stefano, Manrique, Mylenne, Bruni, Fabio, Gianani, Ilaria, Barbieri, Marco
We show how quantum coherence governs the quasiprobability statistics of outcome pairs, consecutively recorded at two distinct times, using weak measurements. In doing this, we have realised weak-sequential measurement with photonic qubits, where the
Externí odkaz:
http://arxiv.org/abs/2406.06713
Autor:
Hernández-Gómez, Santiago, Isogawa, Takuya, Belenchia, Alessio, Levy, Amikam, Fabbri, Nicole, Gherardini, Stefano, Cappellaro, Paola
The Kirkwood-Dirac quasiprobability distribution emerges from the quantum correlation function of two observables measured at distinct times and is therefore relevant for fundamental physics and quantum technologies. These quasiprobabilities follow a
Externí odkaz:
http://arxiv.org/abs/2405.21041
Autor:
Frazao, Gonçalo, Pezzutto, Marco, Omar, Yasser, Cruzeiro, Emmanuel Zambrini, Gherardini, Stefano
Publikováno v:
Entropy 26 (7), 568 (2024)
The metrological limits of thermometry operated in nonequilibrium dynamical regimes are analyzed. We consider a finite-dimensional quantum system, employed as a quantum thermometer, in contact with a thermal bath inducing Markovian thermalization dyn
Externí odkaz:
http://arxiv.org/abs/2405.14439
Autor:
Hernández-Gómez, Santiago, Poggiali, Francesco, Cappellaro, Paola, Cataliotti, Francesco S., Trombettoni, Andrea, Fabbri, Nicole, Gherardini, Stefano
Exchange energy statistics between two bodies at different thermal equilibrium obey the Jarzynski-W\'ojcik fluctuation theorem. The corresponding energy scale factor is the difference of the inverse temperatures associated to the bodies at equilibriu
Externí odkaz:
http://arxiv.org/abs/2404.05310
Publikováno v:
PRX Quantum 5, 030201 (2024)
In this tutorial, we present the definition, interpretation and properties of some of the main quasiprobabilities that can describe the statistics of measurement outcomes evaluated at two or more times. Such statistics incorporate the incompatibility
Externí odkaz:
http://arxiv.org/abs/2403.17138
Publikováno v:
Sci. Rep. 14, 20145 (2024)
In a multi-level quantum system Fano coherences stand for the formation of quantum coherences due to the interaction with the continuum of modes characterizing an incoherent process. When the incoherent source vanishes, Fano coherences tend to disapp
Externí odkaz:
http://arxiv.org/abs/2402.16056