Facets of Non-locality and Advantage in Entanglement-Assisted Classical Communication Tasks
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908449653129216 |
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| author | Rout, Sumit Chaturvedi, Anubhav Bhattacharya, Some Sankar Horodecki, Paweł |
| author_facet | Rout, Sumit Chaturvedi, Anubhav Bhattacharya, Some Sankar Horodecki, Paweł |
| contents | We reveal key connections between non-locality and advantage in correlation-assisted classical communication. First, using the wire-cutting technique, we provide a Bell inequality tailored to any correlation-assisted bounded classical communication task. The violation of this inequality by a quantum correlation is equivalent to its quantum-assisted advantage in the corresponding communication task. Next, we introduce wire-reading, which leverages the readability of classical messages to demonstrate advantageous assistance of non-local correlations in setups where no such advantage can be otherwise observed. Building on this, we introduce families of classical communication tasks in a Bob-without-input prepare-and-measure scenario, where non-local correlation enhances bounded classical communication while shared randomness assistance yields strictly suboptimal payoff. For the first family of tasks, assistance from any non-local facet leads to optimal payoff, while each task in the second family is tailored to a non-local facet. We reveal quantum advantage in these tasks, including qutrit over qubit entanglement advantage. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_10830 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Facets of Non-locality and Advantage in Entanglement-Assisted Classical Communication Tasks Rout, Sumit Chaturvedi, Anubhav Bhattacharya, Some Sankar Horodecki, Paweł Quantum Physics We reveal key connections between non-locality and advantage in correlation-assisted classical communication. First, using the wire-cutting technique, we provide a Bell inequality tailored to any correlation-assisted bounded classical communication task. The violation of this inequality by a quantum correlation is equivalent to its quantum-assisted advantage in the corresponding communication task. Next, we introduce wire-reading, which leverages the readability of classical messages to demonstrate advantageous assistance of non-local correlations in setups where no such advantage can be otherwise observed. Building on this, we introduce families of classical communication tasks in a Bob-without-input prepare-and-measure scenario, where non-local correlation enhances bounded classical communication while shared randomness assistance yields strictly suboptimal payoff. For the first family of tasks, assistance from any non-local facet leads to optimal payoff, while each task in the second family is tailored to a non-local facet. We reveal quantum advantage in these tasks, including qutrit over qubit entanglement advantage. |
| title | Facets of Non-locality and Advantage in Entanglement-Assisted Classical Communication Tasks |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2507.10830 |