Quantum Advantage in Multiple Access Wiretap Channels with Entangled Transmitters

• URL: http://arxiv.org/abs/2609.06808v1
• Date: Sun, 06 Sep 2026 19:58:13 GMT
• Title: Quantum Advantage in Multiple Access Wiretap Channels with Entangled Transmitters
• Abstract summary: We investigate secure communication over a classical multiple-access wiretap channel (MAC-WTC)<n>Under the strict semantic security criterion, we derive an achievable rate region and a regularized expression for the secrecy capacity.<n>Our results demonstrate that entanglement strictly enlarges the secrecy capacity of MAC-WTC compared to sharing only classical correlated randomness.
• Score: 11.619051850120044
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate secure communication over a classical multiple-access wiretap channel (MAC-WTC), specifically exploring the benefit of shared entanglement between the transmitters. Under the strict semantic security criterion, we derive an achievable rate region and a regularized expression for the secrecy capacity. We further establish a single-letter upper bound on the secure capacity of the MAC-WTC with entangled transmitters. Our results demonstrate that entanglement strictly enlarges the secrecy capacity of MAC-WTC compared to sharing only classical correlated randomness, a finding we illustrate using a pseudo-telepathy game example. Finally, we establish new strong soft-covering lemmas for the output statistics of multipleaccess channels (MACs) with entangled transmitters. Our results generalize existing results for non-entangled systems.

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