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Quantifying necessary quantum resources for nonlocality
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DOI：10.1103/PhysRevResearch.4.L012002.png)
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Abstract
En 中文
Nonlocality is one of the most important resources for quantum information protocols. The observation of nonlocal correlations in a Bell experiment is the result of appropriately chosen measurements and quantum states. We quantify the minimal purity to achieve a certain Bell value for any Bell operator. Since purity is the most fundamental resource of a quantum state, this enables us also to quantify the necessary coherence, discord, and entanglement for a given violation of two-qubit correlation inequalities. Our results shine a light on the Clauser-Horne-Shimony-Holt inequality by showing that for a fixed Bell violation an increase in the measurement resources does not always lead to a decrease of the minimal state resources.
Keywords:
BELL INEQUALITY
ENTANGLEMENT
INFERENCE
VIOLATION
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4.2
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