https://doi.org/10.1140/epjst/e2008-00714-y
Multimode thermal-seeded parametric down-conversion: Entanglement and ghost imaging
1
Istituto Nazionale di Ricerca Metrologica, Torino, Italy
2
National Laboratory for Ultrafast and Ultraintense Optical Science, CNR-INFM, Como, Italy
3
CNR-INFM-CNISM, Dipartimento di Fisica e Matematica, Università degli Studi dell'Insubria, Como, Italy
4
Dipartimento di Fisica, Università degli Studi di Milano, Milano, Italy
5
CNISM, U.d.R. Milano Università, Milano, Italy
6
Institute for Scientific Interchange Foundation, Torino, Italy
Corresponding author: degio@inrim.it
We analyze a frequency degenerate two-arm seeded downconversion process in which the seed fields are spatially multimode chaotic fields. We prove that the output state exhibits a transition from entanglement to separability as far as the intensities of the seeds increase, whereas it is suitable for a ghost imaging experiment irrespective of its entanglement properties. Furthermore we present two experiments of ghost imaging with good visibilty based on parametric downconversion seeded on a single arm.
© EDP Sciences, Springer-Verlag, 2008
