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Momentum-space analysis of multipartite entanglement at quantum phase transitions
Alberto Anfossi, Paolo Giorda, Arianna Montorsi
We investigate entanglement properties at quantum phase transitions of an integrable extended Hubbard model in the momentum space representation. Two elementary subsystems are reco…
Local Measures of Entanglement and Critical Exponents at Quantum Phase Transitions
L. Campos Venuti, C. Degli Esposti Boschi, G. Morandi +2
We discuss on general grounds some local indicators of entanglement, that have been proposed recently for the study and classification of quantum phase transitions. In particular,…
Mesoscopic continuous and discrete channels for quantum information transfer
F. de Pasquale, G. Giorgi, S. Paganelli
We study the possibility of realizing perfect quantum state transfer in mesoscopic devices. We discuss the case of the Fano-Anderson model extended to two impurities. For a channel…
Decay in a uniform field: an exactly solvable model
R. M. Cavalcanti, P. Giacconi, R. Soldati
We investigate the time evolution of the decay (or ionization) probability of a D-dimensional model atom (D=1,2,3) in the presence of a uniform (i.e., static and homogeneous) backg…