This review is about single‐particle entanglement. Entanglement occurs when the state of a
quantum system with at least two degrees of freedom has a particular non‐separable form …

We resolve an old problem about the existence of hidden parameters in a three-dimensional
quantum system by constructing an appropriate Bell's type inequality. This reveals the …

Non-local correlations between spatially separated systems have been extensively
discussed in the context of the Einstein, Podolsky and Rosen (EPR) paradox and Bell's …

In this work, we have studied the possibility of setting up Bell's inequality violating
experiment in the context of cosmology, based on the basic principles of quantum …

An open challenge in physics is to expand the frontiers of the validity of quantum mechanics
by evidencing nonclassicality of the center of mass state of a macroscopic object. Yet …

The emerging field of entanglement or nonseparability in classical optics is reviewed, and its
similarities with and differences from quantum entanglement clearly pointed out through a …

We review an event-based simulation approach which reproduces the statistical
distributions of wave theory not by requiring the knowledge of the solution of the wave …

A method was recently proposed and experimentally realized for characterizing a quantum
state by directly measuring its complex probability amplitudes in a particular basis using so …

We show that an experimental demonstration of quantum contextuality using 2 degrees of
freedom of single neutrons based on a violation of an inequality derived from the Peres …

Meyer originally raised the question of whether non-contextual hidden variable models can,
despite the Kochen–Specker theorem, simulate the predictions of quantum mechanics to …