We address the generation of entangled photon pairs by parametric downconversion from solid state cw lasers with small coherence time. We consider a compact and low-cost setup based on a two-crystal scheme with type-I phase matching.We reconstruct the full density matrix by quantum tomography and analyze in detail the entanglement properties of the generated state as a function of the crystal’s length and the coherence time of the pump.We verify the possibility to improve the visibility using a purification protocol based on a compensation crystal
Generation of entangled photon pairs using small coherence time continuous wave pump lasers / S. Cialdi, F. Castelli, I. Boscolo, M. Paris. - In: APPLIED OPTICS. - ISSN 1559-128X. - 47:11(2008), pp. 1832-1836. [10.1364/AO.47.001832]
Generation of entangled photon pairs using small coherence time continuous wave pump lasers
S. CialdiPrimo
;F. CastelliSecondo
;I. BoscoloPenultimo
;M. ParisUltimo
2008
Abstract
We address the generation of entangled photon pairs by parametric downconversion from solid state cw lasers with small coherence time. We consider a compact and low-cost setup based on a two-crystal scheme with type-I phase matching.We reconstruct the full density matrix by quantum tomography and analyze in detail the entanglement properties of the generated state as a function of the crystal’s length and the coherence time of the pump.We verify the possibility to improve the visibility using a purification protocol based on a compensation crystalPubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.