Heisenberg's uncertainty principle forms a fundamental element of quantum mechanics.
Uncertainty relations in terms of entropies were initially proposed to deal with conceptual …

In the context of a physical theory, two devices, A and B, described by the theory are called
incompatible if the theory does not allow the existence of a third device C that would have …

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 …

Quantum repeaters hold promise for scalable long-distance quantum communication. The
basic building block is a quantum light–matter interface that generates non-classical …

By pulsed s-shell resonant excitation of a single quantum dot-micropillar system, we
generate long streams of 1000 near-transform-limited single photons with high mutual …

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 …

Among the known particles, the neutron is special because it provides experimental access
to all of the four fundamental forces and a wide range of hypothetical interactions. Despite …

The notion of uncertainty in the description of a physical system has assumed prodigious
importance in the development of quantum theory. Overcoming the early misunderstanding …

We demonstrate high-fidelity, quantum nondemolition, single-shot readout of a
superconducting flux qubit in which the pointer state distributions can be resolved to below …

Since Niels Bohr said this many years ago, quantum mechanics has only been getting more
shocking. We now realize that it's not really telling us that “weird” things happen out of sight …