Continuous-time quantum walks (CTQWs) have shown the capability to perform efficiently the spatial search of a marked site on many kinds of graphs. However, most of such graphs are hard to realize in an experimental setting. Here we study CTQW spatial search on a planar triangular lattice by means of both numerical simulations and experiments. The experiments are performed using two-dimensional waveguide arrays fabricated by femtosecond laser pulses, illuminated by coherent light. We show that the retrieval of the marked site by the quantum walker is accomplished with higher probability than the classical counterpart, in a convenient time window placed early in the evolution.
Quantum Spatial Search in Two-Dimensional Waveguide Arrays / C. Benedetti, D. Tamascelli, M.G.A. Paris, A. Crespi. - In: PHYSICAL REVIEW APPLIED. - ISSN 2331-7019. - 16:5(2021), pp. 054036.1-054036.10. [10.1103/PhysRevApplied.16.054036]
Quantum Spatial Search in Two-Dimensional Waveguide Arrays
C. BenedettiPrimo
;D. Tamascelli
Secondo
;M.G.A. ParisPenultimo
;
2021
Abstract
Continuous-time quantum walks (CTQWs) have shown the capability to perform efficiently the spatial search of a marked site on many kinds of graphs. However, most of such graphs are hard to realize in an experimental setting. Here we study CTQW spatial search on a planar triangular lattice by means of both numerical simulations and experiments. The experiments are performed using two-dimensional waveguide arrays fabricated by femtosecond laser pulses, illuminated by coherent light. We show that the retrieval of the marked site by the quantum walker is accomplished with higher probability than the classical counterpart, in a convenient time window placed early in the evolution.File | Dimensione | Formato | |
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