Current Science

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In this article, we begin by briefly reviewing the basics of the Leggett-Garg inequality which is a temporal analogue of Bell's inequality, based on the notions of realism and noninvasive measurability. This is followed by outlining the core ideas and key results of two different types of recent studies related to the Leggett-Garg inequality, bringing out its ramifications concerning unsharp measurements and quantum key distribution respectively.

Keywords

Leggett–Garg Inequality, Noninvasive Measurability, Quantum Cryptography, Realism, Unsharp Measurements.
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