436 citations · 2.6k across the 29 of their papers we have counts for
13 papers · 1 filter
Programmable non-Hermitian photonic quantum walks via dichroic metasurfaces
Paola Savarese, Sarvesh Bansal, Maria Gorizia Ammendola +6
The evolution of a closed quantum system is described by a unitary operator generated by a Hermitian Hamiltonian. However, when certain degrees of freedom are coupled to an environ…
Retrieving space-dependent polarization transformations via near-optimal quantum process tomography
Francesco Di Colandrea, Lorenzo Amato, Roberto Schiattarella +2
An optical waveplate rotating light polarization can be modeled as a single-qubit unitary operator, whose action can be experimentally determined via quantum process tomography. St…
Quantum walks of two correlated photons in a 2D synthetic lattice
Chiara Esposito, Mariana R. Barros, Andrés Durán Hernández +7
Quantum walks represent paradigmatic quantum evolutions, enabling powerful applications in the context of topological physics and quantum computation. They have been implemented in…
Ultra-long quantum walks via spin-orbit photonics
Francesco Di Colandrea, Amin Babazadeh, Alexandre Dauphin +3
The possibility of fine-tuning the couplings between optical modes is a key requirement in photonic circuits for quantum simulations. In these architectures, emulating the long-tim…
Two-dimensional topological quantum walks in the momentum space of structured light
Alessio D'Errico, Filippo Cardano, Maria Maffei +7
Quantum walks are powerful tools for quantum applications and for designing topological systems. Although they are simulated in a variety of platforms, genuine two-dimensional real…
Self-healing high-dimensional quantum key distribution using hybrid spin-orbit Bessel states
Isaac Nape, Eileen Otte, Adam Vallés +4
Using spatial modes for quantum key distribution (QKD) has become highly topical due to their infinite dimensionality, promising high information capacity per photon. However, spat…
Continuous-Variable Entangled States of Light carrying Orbital Angular Momentum
A. Pecoraro, F. Cardano, L. Marrucci +1
The orbital angular momentum of light, unlike spin, is an infinite-dimensional discrete variable and may hence offer enhanced performances for encoding, transmitting, and processin…
Dynamical moments reveal a topological quantum transition in a photonic quantum walk
Filippo Cardano, Maria Maffei, Francesco Massa +6
Many phenomena in solid-state physics can be understood in terms of their topological properties. Recently, controlled protocols of quantum walks are proving to be effective simula…
Quantum walks and wavepacket dynamics on a lattice with twisted photons
Filippo Cardano, Francesco Massa, Hammam Qassim +8
The "quantum walk" has emerged recently as a paradigmatic process for the dynamic simulation of complex quantum systems, entanglement production and quantum computation. Hitherto,…
Hardy's paradox tested in the spin-orbit Hilbert space of single photons
Ebrahim Karimi, Filippo Cardano, Maria Maffei +4
We test experimentally the quantum ``paradox'' proposed by Lucien Hardy in 1993 [Phys. Rev. Lett. 71, 1665 (1993)] by using single photons instead of photon pairs. This is achieved…
Photonic quantum walk in a single beam with twisted light
Filippo Cardano, Francesco Massa, Ebrahim Karimi +6
Inspired by the classical phenomenon of random walk, the concept of quantum walk has emerged recently as a powerful platform for the dynamical simulation of complex quantum systems…
Test of mutually unbiased bases for six-dimensional photonic quantum systems
Vincenzo D'Ambrosio, Filippo Cardano, Ebrahim Karimi +4
In quantum information, complementarity of quantum mechanical observables plays a key role. If a system resides in an eigenstate of an observable, the probability distribution for…
Violation of Leggett-type inequalities in the spin-orbit degrees of freedom of a single photon
Filippo Cardano, Ebrahim Karimi, Lorenzo Marrucci +2
We report the experimental violation of Leggett-type inequalities for a hybrid entangled state of spin and orbital angular momentum of a single photon. These inequalities give a ph…