We present a new characterization of quantum theory in terms of simple physical principles
that is different from previous ones in two important respects: first, it only refers to properties …

In a double slit interference experiment, the wave function at the screen with both slits open
is not exactly equal to the sum of the wave functions with the slits individually open one at a …

Quantum theory is the foundation of modern physics. Some of its basic principles, such as
Born's rule, however, are based on postulates which require experimental testing. Any …

Many experiments in the field of quantum foundations seek to adjudicate between quantum
theory and speculative alternatives to it. This requires one to analyze the experimental data …

Can quantum theory be seen as a special case of a more general probabilistic theory, as
classical theory is a special case of the quantum one? We study here the class of …

Quantum theory permits interference between indistinguishable paths but, at the same time,
restricts its order. Single-particle interference, for instance, is limited to the second order, that …

Within the established theoretical framework of quantum mechanics, interference always
occurs between pairs of paths through an interferometer. Higher order interferences with …

The superposition principle is usually incorrectly applied in interference experiments. This
has recently been investigated through numerics based on Finite Difference Time Domain …

We present two complementary viewpoints for combining quantum computers and the
foundations of quantum mechanics. On the one hand, ideal devices can be used as test …

Despite its enormous empirical success, the formalism of quantum theory still raises
fundamental questions: why is nature described in terms of complex Hilbert spaces, and …