Vortex states of photons, electrons, and other particles are non-plane-wave solutions of the
corresponding wave equation with helicoidal wave fronts. These states possess an intrinsic …

Free electron beams such as those employed in electron microscopes have evolved into
powerful tools to investigate photonic nanostructures with an unrivaled combination of …

INTRODUCTION The science of light has undergone two major revolutions over the
previous two centuries. The first—by Grimaldi, Huygens, Fresnel, Young, and Maxwell …

Cat states and Gottesman-Kitaev-Preskill (GKP) states play a key role in quantum
computation and communication with continuous variables. The creation of such states …

Spatiotemporal electron-beam sha** is a bold frontier of electron microscopy. Over the
past decade, sha** methods evolved from static phase plates to low-speed electrostatic …

Spatial modulation of electron beams is an essential tool for various applications such as
nanolithography and imaging, yet its conventional implementations are severely limited and …

Transmission electron microscopy is a basic technique used for examining matter at the
highest magnification scale available. One of its most challenging branches is in situ …

A nuclear excitation following the capture of an electron in an empty orbital has been
recently observed for the first time. So far, the evaluation of the cross section of the process …

It has been shown that the spontaneous emission rate of photons by free electrons, unlike
stimulated emission, is independent of the shape or modulation of the quantum electron …

Electron microscopy and diffraction with ultrashort pulsed electron beams are capable of
imaging transient phenomena with the combined ultrafast temporal and atomic-scale spatial …