CAJ | 학술논문

通过概率信道的隐形传态通常依赖于高维的幺正操作，而在物理实验中实现高维的幺正操作是非常困难的。为了了解怎样通过几个常见概率信道去构造确定性的量子信道。在方案中，发送者或接收者需要引入一个或多个辅助粒子到概率信道中使之融入并纠缠于原有量子，然后对辅助粒子进行投影测量或半正定算子值测量，就能以一定概率建立起发送者及其客户之间的确定性量子信道。在量子通信网络中，通常有多个不同的代理商作为发送者与接收者之间的中继节点，因此，给出了构造发送者和中继代理援助的接收者之间的确定性信道的几个方案。
통과개솔신도적은형전태통상의뢰우고유적요정조작，이재물리실험중실현고유적요정조작시비상곤난적。위료료해즘양통과궤개상견개솔신도거구조학정성적양자신도。재방안중，발송자혹접수자수요인입일개혹다개보조입자도개솔신도중사지융입병규전우원유양자，연후대보조입자진행투영측량혹반정정산자치측량，취능이일정개솔건립기발송자급기객호지간적학정성양자신도。재양자통신망락중，통상유다개불동적대리상작위발송자여접수자지간적중계절점，인차，급출료구조발송자화중계대리원조적접수자지간적학정성신도적궤개방안。
Teleportation schemes based on probabilistic channels usually rely heavily on the implementation of high-dimensional unitary operations while high-dimensional unitary operations are very diffcult to directly implement in physics experiments.This paper describes how to construct deterministic quantum channels via several commonly probabilistic channels.In our schemes,the sender or receiver needs to introduce one or more auxiliary qubits into the probabilistic channel so that these qubits are incorporated and entangled with the original qubits,and then exe-cute a proj ective measurement or a positive operator-valued measure (POVM)on her/his qubits including the ancil-las to establish deterministic channel between the sender and her/his agents with a certain probability.In a quantum teleportation network,there are generally multi spatially remote agents which play the role of relay nodes between a sender and a distant receiver.Hence,we present a scheme for constructing a deterministic channel between the sender and the distant receiver with the assistance of relay agents,respectively.