论文标题
相对论量子通信与快速相互作用的通道容量
Channel capacity of relativistic quantum communication with rapid interaction
论文作者
论文摘要
在这项工作中，我们非扰动地研究了经典和量子信息在全球双曲机空间中的传播，其中通信通道是通过Delta-coupling相互作用与量化的无质量标量场相互作用的两个Qubit检测器之间的传播。这种相互作用近似于非常快速的检测器场相互作用，在每个检测器的时间内有效地发生在一次瞬间。我们表明，当两个检测器通过Delta耦合相互作用时，就可以安排和调整检测器，以便通道容量（至少）与使用\ textIt {gapless tectors}通过landulfo [prd 93，104019]的\ textit {gapless tectors}构建的量子通道一样好。此外，我们证明这种通道能力实际上是最佳的，即，这两种非扰动方法基本上都具有相同的通道容量，因此，就相对论量子交流而言，这两种方法可以被认为是等效的。
In this work we study nonperturbatively the transmission of classical and quantum information in globally hyperbolic spacetimes, where the communication channel is between two qubit detectors interacting with a quantized massless scalar field via delta-coupling interaction. This interaction approximates very rapid detector-field interaction, effectively occurring at a single instant in time for each detector. We show that when both detectors interact via delta-coupling, one can arrange and tune the detectors so that the channel capacity is (at least) as good as the quantum channel constructed nonperturbatively using \textit{gapless detectors} by Landulfo [PRD 93, 104019]. Furthermore, we prove that this channel capacity is in fact optimal, i.e., both nonperturbative methods give essentially the same channel capacity, thus there is a sense in which the two methods can be regarded as equivalent as far as relativistic quantum communication is concerned.
