Are violations to temporal Bell inequalities there when somebody looks?

Abstract

The possibility of observing violations of temporal Bell inequalities, originally proposed by Leggett as a mean of testing the quantum mechanical delocalization of suitably chosen macroscopic bodies, is discussed by taking into account the effect of the measurement process. A general criterion quantifying this possibility is defined and shown not to be fulfilled by the various experimental configurations proposed so far to test inequalities of different forms.

7 pages, 1 eps figure, needs europhys.sty and euromacr.tex, enclosed in the .tar.gz file; accepted for publication in Europhysics Letters

References in corpus (3)

• Entropic Bell Inequalities
• Testing temporal Bell inequalities through repeated measurements in rf-SQUIDs
• Quantum nondemolition measurements on two-level atomic systems and temporal Bell inequalities

Cited by in corpus (6)

• Leggett-Garg Inequalities
• Violation of Leggett-Garg inequalities in quantum measurements with variable resolution and back-action
• Classical Vs Quantum Probability in Sequential Measurements
• Violations of a Leggett-Garg inequality without signalling for a photonic qutrit probed with ambiguous measurements
• Canonical Leggett-Garg Inequality: Nonclassicality of temporal quantum correlations under energy constraint
• Optimal violation of Leggett-Garg inequality for arbitrary spin and emergence of classicality through unsharp measurement