78 citations · 352 across the 15 of their papers we have counts for
15 papers
Bipartite non-locality beyond Bell inequalities by means of multivariable correlations
Bruno Leggio, Bruno Bellomo, Romain Azaïs +2
We give a set of necessary conditions for locality in bipartite systems, which include and generalize known Bell's inequalities. Each condition corresponds to a specific order of t…
Bounds on mixed state entanglement
Bruno Leggio, Anna Napoli, Hiromichi Nakazato +1
In the general framework of mixed states, we derive an explicit bound for bipartite NPT entanglement based on the mixedness characterization of the physical system. The…
Excitation injector in an atomic chain: long-ranged transport and efficiency amplification
Pierre Doyeux, Riccardo Messina, Bruno Leggio +1
We investigate the transport of energy in a linear chain of two-level quantum emitters ("atoms") weakly coupled to a blackbody radiation bath. We show that, simply by displacing on…
Otto engine beyond its standard quantum limit
Bruno Leggio, Mauro Antezza
We propose a quantum Otto cycle based on the properties of a two-level system in a realistic out-of-thermal-equilibrium electromagnetic field acting as its sole reservoir. This ste…
Quantum thermal machine acting on a many-body quantum system: role of correlations in thermodynamic tasks
Pierre Doyeux, Bruno Leggio, Riccardo Messina +1
We study the functioning of a three-level thermal machine when acting on a many-qubit system, the entire system being placed in an electromagnetic field in a stationary out-of-ther…
Distributed thermal tasks on many-body systems through a single quantum machine
Bruno Leggio, Pierre Doyeux, Riccardo Messina +1
We propose a configuration of a single three-level quantum emitter embedded in a non-equilibrium steady electromagnetic environment, able to stabilize and control the local tempera…
Distributed correlations and information flows within a hybrid multipartite quantum-classical system
Bruno Leggio, Rosario Lo Franco, Diogo O. Soares-Pinto +2
Understanding the non-Markovian mechanisms underlying the revivals of quantum entanglement in the presence of classical environments is central in the theory of quantum information…
Quantum thermal machines with single nonequilibrium environments
Bruno Leggio, Bruno Bellomo, Mauro Antezza
We propose a scheme for a quantum thermal machine made by atoms interacting with a single non-equilibrium electromagnetic field. The field is produced by a simple configuration of…
Detecting initial system-environment correlations: Performance of various distance measures for quantum states
S. Wissmann, B. Leggio, H. -P. Breuer
We study the time evolution of four distance measures in the presence of initial systemenvironment correlations. It is well-known that the trace distance between two quantum states…
Entropy production and information fluctuations along quantum trajectories
B. Leggio, A. Napoli, A. Messina +1
Employing the stochastic wave function method, we study quantum features of stochastic entropy production in nonequilibrium processes of open systems. It is demonstarted that conti…
Fluctuation theorems for non-Markovian quantum processes
Bruno Leggio, Anna Napoli, Heinz-Peter Breuer +1
Exploiting previous results on Markovian dynamics and fluctuation theorems, we study the consequences of memory effects on single realizations of nonequilibrium processes within an…
On the merit of a Central Limit Theorem-based approximation in statistical physics
Bruno Leggio, Oleg Lychkovskiy, Antonino Messina
The applicability conditions of a recently reported Central Limit Theorem-based approximation method in statistical physics are investigated and rigorously determined. The failure…
Quantum Phase Transitions and Heat Capacity in a two-atoms Bose-Hubbard Model
B. Leggio, A. Napoli, A. Messina
We show that a two-atoms Bose-Hubbard model exhibits three different phases in the behavior of thermal entanglement in its parameter space. These phases are demonstrated to be trac…
Heat Capacity and Entanglement Measure in a simple two-qubit model
B. Leggio, A. Napoli, H. Nakazato +1
A simple two-qubit model showing Quantum Phase Transitions as a consequence of ground state level crossings is studied in detail. Using the Concurrence of the system as an entangle…
Tomographic approach to the violation of Bell's inequalities for quantum states of two qutrits
Bruno Leggio, Vladimir I Man'ko, Margarita A Man'ko +1
The tomographic method is employed to investigate the presence of quantum correlations in two classes of parameter-dependent states of two qutrits. The violation of some Bell's ine…