Metrological complementarity reveals the Einstein-Podolsky-Rosen paradox.

ABSTRACT: The Einstein-Podolsky-Rosen (EPR) paradox plays a fundamental role in our understanding of quantum mechanics, and is associated with the possibility of predicting the results of non-commuting measurements with a precision that seems to violate the uncertainty principle. This apparent contradiction to complementarity is made possible by nonclassical correlations stronger than entanglement, called steering. Quantum information recognises steering as an essential resource for a number of tasks but, contrary to entanglement, its role for metrology has so far remained unclear. Here, we formulate the EPR paradox in the framework of quantum metrology, showing that it enables the precise estimation of a local phase shift and of its generating observable. Employing a stricter formulation of quantum

SUBMITTER: Yadin B 

PROVIDER: S-EPMC8065158 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature