Linear Optical Quantum Computing

Indistinguishable single-photons can be used in linear optical schemes to implement quantum logic gates and quantum simulation.

Bright quantum dot single-photon sources that generate highly indistinguishable single-photons are highly interesting in this context: they can speed up the gate operation by orders of magnitude and potentially strongly increase the number of photons involved in a quantum simulation.


Our first results along this research line concern the demonstration of an entangling two photon gate using a 80% brightness single-photon source [Gazzano et al. PRL 110, 250501 (2013)] and a Boson sampling measurement with 3 photons [Loredo et al. PRL 118, 130503 (2017)] .

More recent contributions have focused on the generation of ever larger implementations of entangled states:  3, 4 photons on chip + Ascella

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