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Abstract: The concept of a modular value of an observable of a pre- and post-selectedquantum system is introduced. It is similar in form and in some cases has aclose connection to the weak value of an observable, but instead of describingan effective interaction when the coupling is weak, it describes a coupling ofany strength but only to qubit meters. The generalization of the concept for acoupling of a composite system to a multi-qubit meter provides an explanationof some current experiments.



Author: Yaron Kedem, Lev Vaidman

Source: https://arxiv.org/







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