Optical superoscillations are rapid, subwavelength spatial variations of the intensity and
phase of light, occurring in complex electromagnetic fields formed by the interference of …

The local propagation and the energy flux in structured optical fields are often associated
with the Poynting vector. However, the local phase gradient (ie, local wavevector) in …

MV Berry's work [J. Phys. A 43, 415302 (2010) 1751-8113 10.1088/1751-
8113/43/41/415302] highlighted the correspondence between backflow in quantum …

Using standard results from statistics, we show that for any continuous quantum system
(Gaussian or otherwise) and any observable A ̂ (position or otherwise), the distribution π a …

The well-known interference pattern of bright and dark fringes was first observed for light
beams back in 1801 by Thomas Young. The maximum visibility fringes occur when the …

The controlled and continuous negative energy flow (from negative to positive) on the optical
axis in the focal region is obtained by adjusting the polarization distribution of the input …

Quantum backflow refers to the counterintuitive fact that the probability can flow in the
direction opposite to the momentum of a quantum particle. This phenomenon has been seen …

Consider a scenario where a quantum particle is initially prepared in some bounded region
of space and left to propagate freely. After some time, we verify if the particle has reached …

We show that, contrary to the statements made by many authors, the backflow is not a
nonclassical effect. The backflow is a characteristic feature of solutions of the wave …

Mechanical action of various kinds of waves have been known for several centuries. The first
tide of scientific interest in wave-induced forces and torques emerged at the end of the …