107 citations · 574 across the 21 of their papers we have counts for
21 papers · 1 filter
Optical nonclassicality test based on third-order intensity correlations
L. Rigovacca, W. S. Kolthammer, C. Di Franco +1
We develop a nonclassicality criterion for the interference of three delayed, but otherwise identical, light fields in a three-mode Bell interferometer. We do so by comparing the p…
Large scale quantum walks by means of optical fiber cavities
J. Boutari, A. Feizpour, S. Barz +4
We demonstrate a platform for implementing quantum walks that overcomes many of the barriers associated with photonic implementations. We use coupled fiber-optic cavities to implem…
NonClassicality Criteria in Multiport Interferometry
Luca Rigovacca, Carlo Di Franco, Benjamin J. Metcalf +2
Interference lies at the heart of the behavior of classical and quantum light. It is thus crucial to understand the boundaries between which interference patterns can be explained…
Two-walker discrete-time quantum walks on the line with percolation
Luca Rigovacca, Carlo Di Franco
One goal in the quantum-walk research is the exploitation of the intrinsic quantum nature of multiple walkers, in order to achieve the full computational power of the model. Here w…
Experimental Realization of a One-way Quantum Computer Algorithm Solving Simon's Problem
M. S. Tame, B. A. Bell, C. Di Franco +2
We report an experimental demonstration of a one-way implementation of a quantum algorithm solving Simon's Problem - a black box period-finding problem which has an exponential gap…
Chirality asymptotic behavior and non-Markovianity in quantum walks on a line
Margarida Hinarejos, Carlo Di Franco, Alejandro Romanelli +1
We investigate the time evolution of the chirality reduced density matrix for a discrete-time quantum walk on a one-dimensional lattice, which is obtained by tracing out the spatia…
Competition between memory-keeping and memory-erasing decoherence channels
Tony J. G. Apollaro, Salvatore Lorenzo, Carlo Di Franco +2
We study the competing effects of simultaneous Markovian and non-Markovian decoherence mechanisms acting on a single spin. We show the existence of a threshold in the relative stre…
Localization-like effect in two-dimensional alternate quantum walks with periodic coin operations
Carlo Di Franco, Mauro Paternostro
Exploiting multi-dimensional quantum walks as feasible platforms for quantum computation and quantum simulation is attracting constantly growing attention from a broad experimental…
Experimental realisation of a delayed-choice quantum walk
Youn-Chang Jeong, Carlo Di Franco, Hyang-Tag Lim +2
Many paradoxes of quantum mechanics come from the fact that a quantum system can possess different features at the same time, such as in wave-particle duality or quantum superposit…
Measurement-induced generation of spatial entanglement in a two-dimensional quantum walk with single-qubit coin
C. Di Franco, M. Mc Gettrick, T. Machida +1
One of the proposals for the exploitation of two-dimensional quantum walks has been the efficient generation of entanglement. Unfortunately, the technological effort required for t…
Glued trees algorithm under phase damping
J. Lockhart, C. Di Franco, M. Paternostro
We study the behaviour of the glued trees algorithm described by Childs et al. in [STOC `03, Proc. 35th ACM Symposium on Theory of Computing (2004) 59] under decoherence. We consid…
A no-go result on the purification of quantum states
C. Di Franco, M. Paternostro
The information encoded in a quantum system is generally spoiled by the influences of its environment, leading to a transition from pure to mixed states. Reducing the mixedness of…
N-dimensional alternate coined quantum walks from a dispersion relation perspective
Eugenio Roldán, Carlo Di Franco, Fernando Silva +1
We propose an alternative definition of an N-dimensional coined quantum walk by generalizing a recent proposal [Di Franco et al., Phys. Rev. Lett. 106, 080502 (2011)]. This N-dimen…
Alternate two-dimensional quantum walk with a single-qubit coin
C. Di Franco, M. Mc Gettrick, T. Machida +1
We have recently proposed a two-dimensional quantum walk where the requirement of a higher dimensionality of the coin space is substituted with the alternance of the directions in…
Propagation of non-classical correlations across a quantum spin chain
S. Campbell, T. J. G. Apollaro, C. Di Franco +5
We study the transport of quantum correlations across a chain of interacting spin-1/2 particles. As a quantitative figure of merit, we choose a symmetric version of quantum discord…
Bypassing state initialisation in perfect state transfer protocols on spin-chains
C. Di Franco, M. Paternostro, M. S. Kim
Although a complete picture of the full evolution of complex quantum systems would certainly be the most desirable goal, for particular Quantum Information Processing schemes such…
Memory-keeping effects and forgetfulness in the dynamics of a qubit coupled to a spin chain
T. J. G. Apollaro, C. Di Franco, F. Plastina +1
Using recently proposed measures for non-Markovianity [H. P. Breuer, E. M. Laine, and J. Piilo, Phys. Rev. Lett. {\bf 103}, 210401 (2009)], we study the dynamics of a qubit coupled…
Optimal path for a quantum teleportation protocol in entangled networks
C. Di Franco, D. Ballester
Bellman's optimality principle has been of enormous importance in the development of whole branches of applied mathematics, computer science, optimal control theory, economics, dec…
Manipulating and protecting entanglement by means of spin environments
T. J. G. Apollaro, A. Cuccoli, C. Di Franco +3
We study the dynamical behavior of two initially entangled qubits, each locally coupled to an environment embodied by an interacting spin chain. We consider energy-exchange qubit-e…
Quantum state transfer via temporal kicking of information
C. Di Franco, M. Paternostro, M. S. Kim
We propose a strategy for perfect state transfer in spin chains based on the use of an unmodulated coupling Hamiltonian whose coefficients are explicitly time dependent. We show th…
Teleportation protocol with non-ideal conditional local operations
C. Di Franco, D. Ballester
In the standard protocol for quantum teleportation, one assumes that Bob is able to perform ideal operations on his qubit. Here, we analyze the case in which some of these operatio…