玻色热损耗信道的双向辅助量子容量的改进下界
Improved lower bound for the two-way-assisted quantum capacity of the bosonic thermal-loss channel
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中文总结 AI 辅助
该研究改进了玻色热损耗信道双向辅助量子容量的已知最佳下界，通过结合改进的量子比特-玻色子分布技术和纠缠蒸馏协议发现技术，适用于广泛的信道参数。
中文摘要 AI 辅助
玻色热损耗信道是量子通信的基本模型。该高斯信道模拟了受到损耗和热噪声影响的玻色子系统的传输。它描述了许多实际系统，包括光纤、波导和自由空间链路，在这些系统中背景热噪声显著。确定该信道的双向辅助量子容量，即在双向经典辅助下通过该信道可靠传输量子信息的最大速率，仍然是一个未解决的问题。在这里，我们针对广泛的信道参数改进了该容量的已知最佳下界。我们通过将改进的量子比特-玻色子分布技术与最近引入的用于发现纠缠蒸馏协议的技术相结合来实现这一目标。
英文摘要
The bosonic thermal-loss channel is a fundamental model for quantum communication. This Gaussian channel models the transmission of bosonic systems subject to both loss and thermal noise. It describes many practical systems, including optical fibers, waveguides and free-space links, where background thermal noise is significant. Determining the channel's two-way-assisted quantum capacity, the maximum rate at which quantum information can be transmitted reliably through the channel with two-way classical assistance, remains an open problem. Here, we improve upon the best known lower bound for this capacity for a wide range of channel parameters. We achieve this by combining an improved qubit-bosonic distribution technique with a recently introduced technique for discovering entanglement distillation protocols.
发表机构
- University of York（约克大学）
机构由 AI 辅助整理，请以论文原文为准。
