Premium
Generation of (2 × 2) and (4 × 4) two‐photon states with tunable degree of entanglement and mixedness
Author(s) -
Barbieri M.,
Cinelli C.,
De Martini F.,
Mataloni P.
Publication year - 2004
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.200410180
Subject(s) - quantum entanglement , photon entanglement , physics , spontaneous parametric down conversion , photon , interferometry , quantum mechanics , polarization (electrochemistry) , parametric statistics , multi mode optical fiber , quantum , optics , optical fiber , chemistry , mathematics , statistics
A parametric source of polarization entangled photon pairs with peculiar spatial characteristics allows to generate any kind of bi‐partite entangled states with tunable dgree of entanglement and mixedness. In particular, maximally entangled mixed states (MEMS) have been created in a reliable way by a “patchwork” technique and investigated by quantum tomography. By the same source, momentum‐polarization hyper‐entangled two‐photon states have been synthesized. The quality of the entanglement in the two degrees of freedom has been tested by multimode Hong‐Ou‐Mandel interferometry.