With the development of photonic quantum technologies, single photons have become key
for various applications including quantum communication and quantum computing …

The question of how long it takes a particle to tunnel through a potential barrier has been a
subject of intense theoretical debate for the last 80 years. In this decade of attosecond …

To answer some issues raised about the concept of fractional differentiation and integration
based on the exponential and Mittag-Leffler laws, we present, in this paper, fundamental …

Investigating the role of causal order in quantum mechanics has recently revealed that the
causal relations of events may not be a priori well defined in quantum theory. Although this …

Operator noncommutation, a hallmark of quantum theory, limits measurement precision,
according to uncertainty principles. Wielded correctly, though, noncommutation can boost …

The spin Hall effect leads to the separation of electrons with opposite spins in different
directions perpendicular to the electric current flow because of interaction between spin and …

The Heisenberg-Robertson uncertainty relation expresses a limitation in the possible
preparations of the system by giving a lower bound to the product of the variances of two …

Entanglement is a fundamental feature of quantum mechanics and holds great promise for
enhancing metrology and communications. Much of the focus of quantum metrology so far …

While the slogan “no measurement without disturbance” has established itself under the
name of the Heisenberg effect in the consciousness of the scientifically interested public, a …

Recent years have witnessed a controversy over Heisenberg's famous error-disturbance
relation. Here the conflict is resolved by way of an analysis of the possible …