Nonlocal realism tests and quantum state tomography in Sagnac-based type-II polarization-entanglement SPDC-source
Year: 2021
Type: article
Abstract: . Furthermore, using the tomographic reconstruction of quantum states together a maximum-likelihood-technique (MLT) as the numerical optimization, we obtain the physical non-negative definite density operator which shows the nonseparability and entanglement of our prepared state. By having the maximum likelihood density operator, we calculate some important entanglement-measures and entanglement entropies. The Sagnac configuration provides bidirectional crystal pumping yields to high-rate entanglement source which is very applicable in quantum communication, sensing and metrology as well as quantum information protocols, and has potential to be used in quantum illumination-based LIDAR and free-space quantum key distribution (QKD).
Source: Heliyon
Authors: Ali Motazedifard, S.A. Madani, J.J. Dashkasan, N.S. Vayaghan
Institution: Iranian Center for Quantum Technologies
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,750
OpenAlex ID: W3110945407