Multiphoton interference reveals strictly nonclassical phenomena. Its applications range
from fundamental tests of quantum mechanics to photonic quantum information processing …

Even though the Madelung equations are central to many'classical'approaches to the
foundations of quantum mechanics such as Bohmian and stochastic mechanics, no …

I consider the extent to which the applicability of the concept of classical realism is
constrained, irrespective of the validity or not of the quantum formalism, by existing …

Recently, secure quantum key distribution based on Deutsch's algorithm using the Bell state
is reported (Nagata and Nakamura, Int. J. Theor. Phys. doi: 10.1007/s10773-017-3352-4 …

We analyze the class of nonlocal realistic theories that was originally considered by Leggett
[Found. Phys. 33, 1469 (2003) FNDPA4 0015-9018 10.1023/A: 1026096313729] and tested …

We consider probabilistic theories in which the most elementary system, a two-dimensional
system, contains one bit of information. The bit is assumed to be contained in any complete …

Quantum theory predicts and experiments confirm that nature can produce correlations
between distant events that are non-local in the sense of violating a Bell inequality …

We provide an estimate of the absolute values of the emission rate of photon pairs produced
by spontaneous parametric down-conversion in a bulk crystal when all interacting fields are …

We show that failure of local realism can be revealed to observers for whom only extremely-
coarse-grained measurements are available. In our instances, Bell's inequality is violated …

It was shown by Bell that no local hidden variable model is compatible with quantum
mechanics. If, instead, one permits the hidden variables to be entirely nonlocal, then any …