论文标题

易耐故障编码,用于纠缠辅助通信

Fault-tolerant Coding for Entanglement-Assisted Communication

论文作者

Belzig, Paula, Christandl, Matthias, Müller-Hermes, Alexander

论文摘要

通道能力量化了可靠地通过嘈杂渠道发送信息的最佳速率。通常,对能力的研究假设发件人和接收器用于编码和解码的电路由完全噪音的门组成。但是,对于量子通道的通信,由于量子信息的脆弱性,这种假设被普遍认为是不现实的,即使在长期内,这种假设受到破坏过程的影响。因此,Christandl和Müller-Hermes启动了量子通道的易耐故障通道编码的研究,即编码方案,其中编码方案受编码器和解码器电路受噪声的影响,并使用了耐故障量子计算的技术来建立用于在这种情况下发送经典和量子信息的编码的编码。在这里,我们将这些方法扩展到了纠缠辅助通信的情况,特别是证明了易于故障的容量在门误差接近零时接近通常的容量。可能具有独立关注的主要工具是引入耐断层纠缠蒸馏。我们进一步关注所使用的技术的模块化,以便在其他容忍缺​​陷的通信方案中轻松采用它们。

Channel capacities quantify the optimal rates of sending information reliably over noisy channels. Usually, the study of capacities assumes that the circuits which sender and receiver use for encoding and decoding consist of perfectly noiseless gates. In the case of communication over quantum channels, however, this assumption is widely believed to be unrealistic, even in the long-term, due to the fragility of quantum information, which is affected by the process of decoherence. Christandl and Müller-Hermes have therefore initiated the study of fault-tolerant channel coding for quantum channels, i.e. coding schemes where encoder and decoder circuits are affected by noise, and have used techniques from fault-tolerant quantum computing to establish coding theorems for sending classical and quantum information in this scenario. Here, we extend these methods to the case of entanglement-assisted communication, in particular proving that the fault-tolerant capacity approaches the usual capacity when the gate error approaches zero. A main tool, which might be of independent interest, is the introduction of fault-tolerant entanglement distillation. We furthermore focus on the modularity of the techniques used, so that they can be easily adopted in other fault-tolerant communication scenarios.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源