Remote which-way-choice scheme: proposed foundations experiments

Abstract

Twin photons from spontaneous parametric down-conversion with preselected polarization are used as spatially disjoint subsystems. One photon is subject to an interference measurement, while a projective measurement of the second photon induces the way-choice of the first photon. This would be an example of way-choice free of direct action on the interfering photon. Two further applications of the proposed scheme are considered: a new method of quantum information speed measurement, and a test of commutation of space-like remote measurements.

15 pages, 4 figures, corrected typos

References in corpus (12)

• Decoherence, einselection, and the quantum origins of the classical
• An Electronic Mach-Zehnder Interferometer
• Quantum Information and Relativity Theory
• Decoherence of matter waves by thermal emission of radiation
• Instantaneous Spreading and Einstein Causality in Quantum Theory
• Unsharp Localization and Causality in Relativistic Quantum Theory
• Optical tests of quantum nonlocality: from EPR-Bell tests towards experiments with moving observers
• The Uncertainty Relation in "Which-Way" Experiments: How to Observe Directly the Momentum Transfer using Weak Values
• Causality and Nonlocality as Axioms for Quantum Mechanics
• Why do Bell experiments?
• Quantum measurement breaks Lorentz symmetry
• Superluminal telecommunication: an observable contradiction between quantum entanglement and relativistic causality