Testing temporal Bell inequalities through repeated measurements in rf-SQUIDs

Abstract

Temporal Bell-like inequalities are derived taking into account the influence of the measurement apparatus on the observed magnetic flux in a rf-SQUID. Quantum measurement theory is shown to predict violations of these inequalities only when the flux states corresponding to opposite current senses are not distinguishable. Thus rf-SQUIDs cannot help to discriminate realism and quantum mechanics at the macroscopic level.

12 pages, 4 Postscript figures in an uuencoded file figures.uu, uses revtex.sty

References in corpus (2)

• Optimal Monitoring of Position in Nonlinear Quantum Systems
• Optimal Measurements of Magnetic Flux in Superconducting Circuits and Macroscopic Quantum Mechanics

Cited by in corpus (8)

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• The Leggett-Garg inequality in electron interferometers
• Optimal Measurements of Magnetic Flux in Superconducting Circuits and Macroscopic Quantum Mechanics
• Optimal violation of Leggett-Garg inequality for arbitrary spin and emergence of classicality through unsharp measurement
• Joint reality and Bell inequalities for consecutive measurements
• Macroscopic quantum damping in SQUID rings
• Are violations to temporal Bell inequalities there when somebody looks?
• Quantum Non-Demolition Measurements and Leggett-Garg inequality