Unbounded Sharing of Nonlocality Using Projective Measurements

• URL: http://arxiv.org/abs/2311.07977v1
• Date: Tue, 14 Nov 2023 08:09:16 GMT
• Title: Unbounded Sharing of Nonlocality Using Projective Measurements
• Authors: S. Sasmal, S. Kanjilal and A. K. Pan
• Abstract summary: A sharp projective measurement in one side of the Bell experiment destroys the entanglement of the shared state. We introduce a local randomness-assisted projective measurement protocol, enabling the sharing of nonlocality by an arbitrary number of sequential observers.
• Score: 0.0
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: It is a common perception that a sharp projective measurement in one side of the Bell experiment destroys the entanglement of the shared state, thereby preventing the demonstration of sequential sharing of nonlocality. In contrast, we introduce a local randomness-assisted projective measurement protocol, enabling the sharing of nonlocality by an arbitrary number of sequential observers (Bobs) with a single spatially separated party Alice. Subsequently, a crucial feature of the interplay between the degrees of incompatibility of observables of both parties is revealed, enabling the unbounded sharing of nonlocality. Our findings, not only offer a new paradigm for understanding the fundamental nature of incompatibility in demonstrating quantum nonlocality but also pave a new path for various information processing tasks based on local randomness-assisted projective measurement.

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