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Sci Rep ; 10(1): 4379, 2020 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-32127644


An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Phys Rev Lett ; 123(14): 140501, 2019 Oct 04.
Artigo em Inglês | MEDLINE | ID: mdl-31702172


Many disordered systems show a superdiffusive dynamics, intermediate between the diffusive one, typical of a classical stochastic process, and the so-called ballistic behavior, which is generally expected for the spreading in a quantum process. We have experimentally investigated the superdiffusive behavior of a quantum walk, whose dynamics can be related to energy transport phenomena, with a resolution which is high enough to clearly distinguish between different disorder regimes. By our experimental setup, the region between ballistic and diffusive spreading can be effectively scanned by suitably setting few degrees of freedom and without applying any decoherence to the quantum walk evolution.

Sci Rep ; 9(1): 3205, 2019 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-30824831


We present a new optical scheme enabling the implementation of highly stable and configurable non-Markovian dynamics. Here one photon qubit can circulate in a multipass bulk geometry consisting of two concatenated Sagnac interferometers to simulate the so called collisional model, where the system interacts at discrete times with a vacuum environment. We show the optical features of our apparatus and three different implementations of it, replicating a pure Markovian scenario and two non-Markovian ones, where we quantify the information backflow by tracking the evolution of the initial entanglement between the system photon and an ancillary one.

Opt Lett ; 44(1): 41-44, 2019 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-30645543


In this work, we demonstrate the use of stimulated emission tomography to characterize a hyperentangled state generated by spontaneous parametric downconversion in a cw-pumped source. In particular, we consider the generation of hyperentangled states consisting of photon pairs entangled in polarization and path. These results extend the capability of stimulated emission tomography beyond the polarization degree of freedom and demonstrate the use of this technique to study states in higher dimension Hilbert spaces.