We address the discrimination between attractive and repulsive interaction in systems made of two identical bosons propagating on a one-dimensional lattice, and suggest a probing scheme exploiting the dynamical properties of the corresponding two-particle quantum walks. In particular, we show that the sign of the interaction leaves a clear signature in the dynamics of the two walkers, which is governed by the Hubbard model, and in their quantum correlations, thus permitting one to discriminate between the two cases. We also prove that these features are strictly connected to the band structure of the Hubbard Hamiltonian.
|Titolo:||Probing the sign of the Hubbard interaction by two-particle quantum walks|
PARIS, MATTEO (Ultimo)
|Parole Chiave:||Atomic and Molecular Physics, and Optics|
|Settore Scientifico Disciplinare:||Settore FIS/03 - Fisica della Materia|
|Data di pubblicazione:||2018|
|Digital Object Identifier (DOI):||10.1103/PhysRevA.97.013610|
|Appare nelle tipologie:||01 - Articolo su periodico|