A central result in the foundations of quantum mechanics is the Kochen-Specker theorem. In
short, it states that quantum mechanics is in conflict with classical models in which the result …

Some measurements in quantum mechanics disturb each other. This has puzzled physicists
since the formulation of the theory, but only in recent decades has the incompatibility of …

In contrast to the spatial Bell's inequalities which probe entanglement between spatially
separated systems, the Leggett–Garg inequalities test the correlations of a single system …

Large-scale quantum effects have always played an important role in the foundations of
quantum theory. With recent experimental progress and the aspiration for quantum …

Macroscopic realism is the name for a class of modifications to quantum theory that allow
macroscopic objects to be described in a measurement-independent manner, while largely …

We report on a stringent test of the nonclassicality of the motion of a massive quantum
particle, which propagates on a discrete lattice. Measuring temporal correlations of the …

The quantum superposition principle states that an entity can exist in two different states
simultaneously, counter to our'classical'intuition. Is it possible to understand a given system's …

The notion of macrorealism was introduced by Leggett and Garg in an attempt to capture our
intuitive conception of the macroscopic world, which seems difficult to reconcile with our …

Tests of local realism and macrorealism have historically been discussed in very similar
terms: Leggett-Garg inequalities follow Bell inequalities as necessary conditions for classical …

Leggett and Garg formulated macrorealist models encoding our intuition on classical
systems, ie, physical quantities have a definite value that can be measured with minimal …