3.9k citations · 28.3k across the 275 of their papers we have counts for
11 papers · 2 filters
Energy upper bound for structurally stable N-passive states
Raffaele Salvia, Vittorio Giovannetti
Passive states are special configurations of a quantum system which exhibit no energy decrement at the end of an arbitrary cyclic driving of the model Hamiltonian. When applied to…
Geometric phase through spatial potential engineering
Stefano Cusumano, Antonella De Pasquale, Vittorio Giovannetti
We propose a spatial analog of the Berry's phase mechanism for the coherent manipulation of states of non-relativistic massive particles moving in a two-dimensional landscape. In o…
Quantum flags, and new bounds on the quantum capacity of the depolarizing channel
Marco Fanizza, Farzad Kianvash, Vittorio Giovannetti
A new bound for the quantum capacity of the -dimensional depolarizing channels is presented. Our derivation makes use of a flagged extension of the map where the receiver obtain…
Exclusive Hong-Ou-Mandel zero-coincidence point
Yu Yang, Luping Xu, Vittorio Giovannetti
A generalized multi-parameter Hong-Ou-Mandel interferometer is presented which extends the conventional "Mandel dip" configuration to the case where a symmetric biphoton source is…
Quantum bath statistics tagging
Donato Farina, Vasco Cavina, Vittorio Giovannetti
The possibility of discriminating the statistics of a thermal bath using indirect measurements performed on quantum probes is presented. The scheme relies on the fact that, when we…
Stretching potential engineering
Stefano Cusumano, Antonella De Pasquale, Giuseppe Carlo La Rocca +1
As the possibility to decouple temporal and spatial variations of the electromagnetic field, leading to a wavelength stretching, has been recognized to be of paramount importance f…
Quantum-capacity bounds in spin-network communication channels
Stefano Chessa, Marco Fanizza, Vittorio Giovannetti
Using the Lieb-Robinson inequality and the continuity property of the quantum capacities in terms of the diamond norm, we derive an upper bound on the values that these capacities…
Time-Polynomial Lieb-Robinson bounds for finite-range spin-network models
Stefano Chessa, Vittorio Giovannetti
The Lieb-Robinson bound sets a theoretical upper limit on the speed at which information can propagate in non-relativistic quantum spin networks. In its original version, it result…
Open Quantum System Dynamics: recovering positivity of the Redfield equation via Partial-Secular Approximation
Donato Farina, Vittorio Giovannetti
We show how to recover complete positivity (and hence positivity) of the Redfield equation via a coarse grain average technique. We derive general bounds for the coarse graining ti…
Non-Markov Enhancement of Maximum Power for Quantum Thermal Machines
Paolo Abiuso, Vittorio Giovannetti
In this work we study how the non-Markovian character of the dynamics can affect the thermodynamic performance of a quantum thermal engine, by analysing the maximum power output of…
A dynamical model for Positive-Operator Valued Measures
A. De Pasquale, C. Foti, A. Cuccoli +2
We tackle the dynamical description of the quantum measurement process, by explicitly addressing the interaction between the system under investigation with the measurement apparat…