Optical measurements that can achieve the fundamental quantum limits have the potential to
improve the imaging of subdiffraction objects in important applications, including optical …

Coherence, similar to amplitude, polarization, and phase, is a fundamental characteristic of
the light fields and is dominated by the statistical optical property. Although spatial …

The quantum Cramér-Rao bound for the joint estimation of the centroid and the separation
between two incoherent point sources cannot be saturated. As such, the optimal …

Historically, the resolution of optical imaging systems was dictated by diffraction, and the
Rayleigh criterion was long considered an unsurpassable limit. In superresolution …

The image of an optical point source is blurred due to light diffraction so that estimating small
displacements of the point source with direct imaging demands elaborate processing on the …

We establish fundamental bounds on subwavelength resolution for the radar ranging
problem,“superradar.” Information-theoretical metrics are applied to probe the resolution …

A partially coherent object's localization parameters are shown to be theoretically estimable
with higher precision than those of an incoherent object, and the maximum number of …

The development of high-resolution, large-baseline optical interferometers would
revolutionize astronomical imaging. However, classical techniques are hindered by physical …

Correlation plenoptic imaging (CPI) is a scanning-free diffraction-limited 3D optical imaging
technique exploiting the peculiar properties of correlated light sources. CPI has been further …

Measuring small separations between two optical sources, either in space or in time,
constitutes an important metrological challenge as standard intensity-only measurements …