Coherence Distillation Unveils Einstein-Podolsky-Rosen Steering

• URL: http://arxiv.org/abs/2312.01055v2
• Date: Mon, 8 Jan 2024 08:38:09 GMT
• Title: Coherence Distillation Unveils Einstein-Podolsky-Rosen Steering
• Authors: Kuan-Yi Lee, Jhen-Dong Lin, Karel Lemr, Anton\'in \v{C}ernoch, Adam Miranowicz, Franco Nori, Huan-Yu Ku, and Yueh-Nan Chen
• Abstract summary: We focus on quantum steering and the local distillable coherence for a steered subsystem. We prove that the proposed steering witness can detect one-way steerable and all pure entangled states.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum coherence is a fundamental property in quantum information science. Recent developments have provided valuable insights into its distillability and its relationship with nonlocal quantum correlations, such as quantum discord and entanglement. In this work, we focus on quantum steering and the local distillable coherence for a steered subsystem. We propose a steering inequality based on collaborative coherence distillation. Notably, we prove that the proposed steering witness can detect one-way steerable and all pure entangled states. Through linear optical experiments, we corroborate our theoretical efficacy in detecting pure entangled states. Furthermore, we demonstrate that the violation of the steering inequality can be employed as a quantifier of measurement incompatibility. Our work provides a clear quantitative and operational connection between coherence and entanglement, two landmark manifestations of quantum theory and both key enablers for quantum technologies.

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