,The race for quantum supremacy: pushing the classical limit for photonic hardware

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The strong efforts towards the realization of scalable quantum computing are motivated by the promise of super-polynomial speed-up in several computational tasks.A first fundamental step in this route is to provide concrete evidence ofquantum supremacy.Such a regime is obtained when a quantum device is capable of solving a specific problem faster than the best classical hardware.A serious attempt to provide a first demonstration of quantu speed-up with affordable resources is represented by boson sampling [1,2],a non-universal quantum-computational protocol exploiting indistinguishable single photons and linear optical devices.
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