We propose a review of recent developments on entanglement and nonclassical effects in
collective two-atom systems and present a uniform physical picture of the many predicted …

Quantum non-Gaussian states of photons and phonons are conclusive and direct witnesses
of higher-than-quadratic nonlinearities in optical and mechanical processes. Moreover, they …

The? eld that encompasses the term “quantum interference” combines a number of separate
concepts, and has a variety of manifestations in d-ferent areas of physics. In the sense …

Interference is central to quantum physics and occurs when indistinguishable paths exist, as
in a double-slit experiment. Replacing the two slits with single atoms introduces optical …

The spatial resolution of an imaging apparatus is limited by the Rayleigh diffraction bound, a
consequence of the imager's finite spatial extent. We show some N-photon strategies that …

Photon statistics divides light sources into three different categories, characterized by
bunched, antibunched, or uncorrelated photon arrival times. Single atoms, ions, molecules …

We propose a method for generating all symmetric Dicke states, either in the long-lived
internal levels of N massive particles or in the polarization degrees of freedom of photonic …

Cooperative effects of multiple quantum emitters are characterized by transitions via
delocalized collective states with altered emission properties due to the existence of …

Superradiance has been an outstanding problem in quantum optics since Dicke introduced
the concept of enhanced directional spontaneous emission by an ensemble of identical two …

Indistinguishable quantum emitters confined to length scales smaller than the wavelength of
the light become superradiant. Compared to uncorrelated and distinguishable emitters …