Quantum walks and wavepacket dynamics on a lattice with twisted photons
| Autor: | Cardano, Filippo, Massa, Francesco, Qassim, Hammam, Karimi, Ebrahim, Slussarenko, Sergei, Paparo, Domenico, de Lisio, Corrado, Sciarrino, Fabio, Santamato, Enrico, Boyd, Robert W., Marrucci, Lorenzo |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Science Advances 1, e1500087 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1126/sciadv.1500087 |
| Popis: | The "quantum walk" has emerged recently as a paradigmatic process for the dynamic simulation of complex quantum systems, entanglement production and quantum computation. Hitherto, photonic implementations of quantum walks have mainly been based on multi-path interferometric schemes in real space. Here, we report the experimental realization of a discrete quantum walk taking place in the orbital angular momentum space of light, both for a single photon and for two simultaneous photons. In contrast to previous implementations, the whole process develops in a single light beam, with no need of interferometers; it requires optical resources scaling linearly with the number of steps; and it allows flexible control of input and output superposition states. Exploiting the latter property, we explored the system band structure in momentum space and the associated spin-orbit topological features by simulating the quantum dynamics of Gaussian wavepackets. Our demonstration introduces a novel versatile photonic platform for quantum simulations. Comment: This revised version has a new title; few errors have been corrected and some images have been modified in order to present the data clearly. arXiv admin note: substantial text overlap with arXiv:1403.4857 |
| Databáze: | arXiv |
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