Portal de Periódicos da CAPES

Demonstration of a programmable source of two-photon multiqubit entangled states

2010; American Physical Society; Volume: 81; Issue: 4 Linguagem: Inglês

10.1103/physreva.81.042322

1538-4446

S. Cialdi, Davide Brivio, Matteo G. A. Paris,

Neural Networks and Reservoir Computing

We suggest and demonstrate a novel source of two-photon multipartite entangled states which exploits the transverse spatial structure of spontaneous parametric downconversion together with a programmable spatial light modulator (SLM). The 1D SLM is used to perform polarization entanglement purification and to realize arbitrary phase-gates between polarization and momentum degrees of freedom of photons. We experimentally demonstrate our scheme by generating two-photon three qubit linear cluster states with high fidelity using a diode laser pump with a limited coherence time and power on the crystal as low as 2.5$mW.