Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Multiparameter Quantum Metrology of Incoherent Point Sources: Towards Realistic Superresolution


Sanchez-Soto,  Luis
Quantumness, Tomography, Entanglement, and Codes, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;
Univ Complutense, Fac Fis, Dept Opt, Complutense University of Madrid, E-28040 Madrid, Spain;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

(Preprint), 137KB

Supplementary Material (public)
There is no public supplementary material available

Rehacek, J., Hradil, Z., Stoklasa, B., Paur, M., Grover, J., Krzic, A., et al. (2017). Multiparameter Quantum Metrology of Incoherent Point Sources: Towards Realistic Superresolution. Physical Review A, 96(6): 062107. doi:10.1103/PhysRevA.96.062107.

Cite as: https://hdl.handle.net/21.11116/0000-0006-DF37-2
We establish the multiparameter quantum Cramér-Rao bound for simultaneously estimating the centroid, the separation, and the relative intensities of two incoherent optical point sources using alinear imaging system. For equally bright sources, the Cramér-Rao bound is independent of the source separation, which confirms that the Rayleigh resolution limit is just an artifact of the
conventional direct imaging and can be overcome with an adequate strategy. For the general case of unequally bright sources, the amount of information one can
gain about the separation falls to zero, but we show that there is always a quadratic improvement in an optimal detection in comparison with the intensity measurements. This advantage can be of utmost important in realistic scenarios, such as observational astronomy.