Year: 2006
Type: article
Abstract: The multiphoton states generated by high-gain spontaneous parametric down-conversion (SPDC) in the presence of large losses are investigated theoretically and experimentally. The explicit form for the two-photon output state has been found to exhibit a Werner structure very resilient to losses for any value of the nonlinear gain parameter $g$. The theoretical results are found to be in agreement with experimental data obtained by ``entanglement witness'' methods and by the quantum tomography of the state generated by a high-$g$ SPDC.
Source: Physical Review A
Institutions: Sapienza University of Rome, Centro Ricerche Enrico Fermi
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2129199068