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 …

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 …

The probability density of a quantum particle moving freely within a circular ring can exhibit
local flow patterns inconsistent with its angular momentum, a phenomenon known as …

We study the quantum backflow problem for a massless charged Dirac fermion constrained
to move on a ring of radius R. Using the relativistic current operator for states of definite …

Decoherence is a well established process for the emergence of classical mechanics in
open quantum systems. However, it can have two different origins or mechanisms …

In its standard formulation, quantum backflow is a classically impossible phenomenon in
which a free quantum particle in a positive-momentum state exhibits a negative probability …

Quantum backflow is the unexpected effect that wavepackets consisting of only positive
momentum components can apparently move in the negative direction. This is usually …

A way is presented to design quantum wave functions that exhibit backflow, namely negative
probability current despite having a strictly positive spectrum of momentum. These wave …