Quantum codewords contradict local realism

Quantum Physics: A Case for Anti-Realism?

Macroscopic Local Realism Incompatible with Quantum Mechanics: Failure of Local Realism where Measurements give Macroscopic Uncertainties

We show that quantum mechanics predicts a contradiction with local hidden variable theories for photon number measurements which have limited resolving power, to the point of imposing an uncertainty in the photon number result which is macroscopic in absolute terms. We show how this can be interpreted as a failure of a new premise, macroscopic local realism. Bell [1] in 1966 showed that the pre...

Generalized quantum measurements and local realism

The structure of a local hidden variable model for experiments involving sequences of measurements is analyzed. Constraints imposed by local realism on the conditional probabilities of the outcomes of such measurement schemes are explicitly derived. The violation of local realism in the case of “hidden nonlocality” is illustrated by an operational example. Typeset using REVTEX 1

Reconciling local realism with quantum mechanics: the generalized BCHSH inequalities

Most physicists uphold that the tests of the Bell–Clauser, Horne, Shimony and Holt (BCHSH) inequalities confirm quantum mechanics (QM) and refute local realism. Some scholars, however, criticize this conviction, yet maintaining that QM conflicts with local realism. At variance with both viewpoints one of the authors has recently worked out an extended semantic realism (ESR) model which shows th...

Macroscopic Local Realism: How Do We Define It and Is It Compatible with Quantum Mechanics?

We introduce the concept of different orders (microthrough to macro-) of local realism. ``Macroscopic local realism'' states that events occurring at a location B cannot induce (immediate) macroscopic changes to a system at a location A spatially separated from B. ``Local realism'' in its entirety excludes all sizes of change. ``Local realism'' in its entirety is used by Einstein, Podolsky, and...