Counterfactual Statements and Weak Measurements: an Experimental Proposal

Details Counterfactual Statements and Weak Measurements: an Experimental Proposal Counterfactual Statements and Weak Measurements: an Experimental Proposal

2001-09-10

arxiv.org/abs/quant-ph/0109042v1

Physics

Quantum Physics

Scientific paper

10.1016/S0375-9601(01)00783-6

A recent analysis [quant-ph/0104062] suggests that weak measurements can be used to give observational meaning to counterfactual reasoning in quantum physics. A weak measurement is predicted to assign a negative unit population to a specific state in an interferometric Gedankenexperiment proposed by Hardy. We propose an experimental implementation with trapped ions of the Gedankenexperiment and of the weak measurement. In our standard quantum mechanical analysis of the proposal no states have negative population, but we identify the registration of a negative population by particles being displaced on average in the direction opposite to a force acting upon them.

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