The concepts of quantum detection and estimation theory can be of great help in the analysis of faint signals, which must be treated with extreme care due to the fragility and subtlety. But this is surely not the only domain, where the advanced concepts may be applied. Strong optical fields can be analyzed by similar techniques since by virtue of first quantization any optical wave plays role of a quantum state. More precisely, a classical mode of light can be given and alternative interpretation as a quantum state of the spatial degrees of freedom of a photon. Here the formulation of classical optics meets those of quantum information processing. The goal of the research is to optimize classical sensing schemes of strong signals in order to attain the best performance allowed by Nature. As examples of the approach, measurement of two point-like sources separation and full characterization of laser beams by a phase-space tomography will be discussed both theoretically and experimentally.
Bohumil Stoklasa, Jaroslav Rehacek, Zdenek Hradil, Martin Paur, Libor Motka, and Luis Lorenzo Sánchez-Soto, "Quantum enhanced classical imaging and metrology (Conference Presentation)," Proc. SPIE 10442, Quantum Information Science and Technology III, 104420H (Presented at SPIE Security + Defence: September 14, 2017; Published: 19 October 2017); https://doi.org/10.1117/12.2279533.5618116239001.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.