Quantum Communication in Rindler Spacetime
Quantum Communication in Rindler Spacetime
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DOI：
10.1007/s00220-012-1476-1
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发表时间：
2010-07
影响因子：
2.4
通讯作者：
K. Brádler;P. Hayden;P. Panangaden
中科院分区：
文献类型：
--
作者：
K. Brádler;P. Hayden;P. Panangaden
在闵可夫斯基空间中，惯性观察者认为是真空的状态，在加速观察者看来，是辐射的热浴。我们研究了这种Davies-Fulling-Unruh噪声对通信的影响，特别是从惯性发送者到加速观察者的量子通信，以及在加速窃听者存在下两个惯性观察者之间的私人通信。在这两种情况下，我们建立紧凑的，易于处理的公式相关联的通信容量假设编码，允许一个单一的激励在一个固定数量的模式，每次使用的通信信道。我们的贡献包括严格介绍的私人量子容量的一般理论，以及这些通道的结构的详细分析，包括它们的群论性质和证明，它们是共轭降解。Unruh信道和光放大器之间的连接也进行了讨论。
A state that an inertial observer in Minkowski space perceives to be the vacuum will appear to an accelerating observer to be a thermal bath of radiation. We study the impact of this Davies-Fulling-Unruh noise on communication, particularly quantum communication from an inertial sender to an accelerating observer and private communication between two inertial observers in the presence of an accelerating eavesdropper. In both cases, we establish compact, tractable formulas for the associated communication capacities assuming encodings that allow a single excitation in one of a fixed number of modes per use of the communications channel. Our contributions include a rigorous presentation of the general theory of the private quantum capacity as well as a detailed analysis of the structure of these channels, including their group-theoretic properties and a proof that they are conjugate degradable. Connections between the Unruh channel and optical amplifiers are also discussed.