Strong entanglement criterion involving momentum weak values

In recent years weak values have been used to explore interesting quantum features in novel ways. In particular, the real part of the weak value of the momentum operator has been widely studied, mainly in connection with (nonlocal) Bohmian trajectories. Here we focus on the imaginary part and its ro...

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Bibliographic Details
Published in:arXiv.org 2019-02
Main Authors: Valdés-Hernández, A, de la Peña, L, Cetto, A M
Format: Article
Language:English
Subjects:
Coding
Criteria
Entanglement
Momentum
Online Access:Get full text
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Summary:In recent years weak values have been used to explore interesting quantum features in novel ways. In particular, the real part of the weak value of the momentum operator has been widely studied, mainly in connection with (nonlocal) Bohmian trajectories. Here we focus on the imaginary part and its role in relation with the entanglement of a bipartite system. We establish an entanglement criterion based on weak momentum correlations, that allows to discern whether the entanglement is encoded in the amplitude and/or in the phase of the wave function. Our results throw light on the physical role of the real and imaginary parts of the weak values, and stress the relevance of the latter in the multi-particle scenario
ISSN:2331-8422
DOI:10.48550/arxiv.1810.08296