Measurement Induced Nonlocality Quantified by Hellinger Distance and weak measurements

Indrajith V S; R. Muthuganesan; R. Sankaranarayanan

doi:10.1016/j.physa.2020.125615

paper

Measurement Induced Nonlocality Quantified by Hellinger Distance and weak measurements

arXiv:2007.08126 · doi:10.1016/j.physa.2020.125615

Abstract

In this article, we propose measurement-induced nonlocality (MIN) quantified by Hellinger distance using von Neumann projective measurement. The proposed MIN is a bonafide measure of nonlocal correlation and is resistant to local ancilla problem. We obtain an analytical expression of the Hellinger distance MIN for general pure and $2 \otimes n$ mixed states. In addition to comparing with similar measures, we explore the role of weak measurement in capturing nonlocal correlation.

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