Anderson localization of entangled photons in an integrated quantum walk

By Andrea Crespi, Roberto Osellame, Roberta Ramponi, Vittorio Giovannetti, Rosario Fazio, L. Sansoni, F. De nicola, Fabio Sciarrino, Paolo Mataloni. Nature Photonics, 2013

416 citations recorded by the source corpus.

First predicted for quantum particles in the presence of a disordered potential, Anderson localization is a ubiquitous effect, observed also in classical systems, arising from the destructive interference of waves propagating in static disordered media. Here we report the observation of this phenomenon for pairs of polarization-entangled photons in a discrete quantum walk affected by position-dependent disorder. By exploiting polarization entanglement of photons to simulate different quantum statistics, we experimentally investigate the interplay between the Anderson localization mechanism and the bosonic/fermionic symmetry of the wavefunction. The disordered lattice is realized by an integrated array of interferometers fabricated in glass by femtosecond laser writing. A novel technique is used to introduce a controlled phase shift into each unit mesh of the network. This approach yields great potential for quantum simulation and for implementing a computational power beyond the one of a classical computer in the ‘hard-to-simulate’ scenario. Researchers observe Anderson localization for pairs of polarization-entangled photons in a discrete quantum walk affected by position-dependent disorder. By exploiting polarization entanglement of photons to simulate different quantum statistics, they experimentally investigate the interplay between the Anderson localization mechanism and the bosonic/fermionic symmetry of the wave function.

Subfields: Acoustics and Ultrasonics, Artificial Intelligence

View Paper: https://www.semanticscholar.org/paper/4379655272b73d46100e3c5486b42290fe94988f

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Citations in the corpus

Progress in ultrafast laser processing and future prospects (2017, neutral): “, trapping of scattered fields in a disordered material) has been successfully demonstrated [92, 93].”
Integrated photonic quantum technologies (2019, methodology): “rticles is occurring during the quantum dynamics. The discrete-time QW allowed the observation of single-particle and two-particle Anderson localization with bosonic and fermionic statistics (Fig.5c) [104, 105], and the entanglement growth after a spin chain quench [106]. The continuous-time QW has ”
On-chip quantum interference between silicon photon-pair sources (2013, background): “[7] Crespi, A.”
Light fields in complex media: Mesoscopic scattering meets wave control (2017, background): “Mesoscopic effects such as Anderson localization have been studied with non-classical states in waveguide arrays (Crespi et al., 2013; Schreiber et al., 2011) and it would be very interesting to study these effects in genuine disordered systems.”
Ultra‐broadband nanophotonic beamsplitter using an anisotropic sub‐wavelength metamaterial (2016, background): “Integrated photonic systems are poised to produce key advances in areas such as optical communications [1,2], sensing [3, 4], spectroscopy [5, 6], metrology [7], frequency comb generation [8] and quantum physics [9, 10].”
Topological characterization of chiral models through their long time dynamics (2017, background): “IV may be implemented by periodical modulation of the separation between the waveguides along the propagation direction [43, 45], and long-ranged tunnelings may be obtained by letting the waveguides propagate out of the plane, as possible in 3D-photonic chips [46, 47].”