二粒子态控制双向量子隐形传态（英文）

Controlled Bidirectional Two-qubit Quantum Teleportation

为实现二粒子态的控制双向量子隐形传态,基于张量分析、贝尔基测量和冯·诺依曼测量等方法,提出二粒子态控制双向量子隐形传态的通道准则,准则中,选择九粒子纠缠态为量子通道,并给出任意九粒子纠缠态能否作为量子通道的必要条件.基于该条件,控制者完成冯·诺依曼测量后,通道被分为单通道、双通道、三通道和四通道.以双通道为例进行计算分析,在Alice、Bob和Controller的共同作用下,经冯·诺依曼测量后进行贝尔基测量和对应的幺正变换,最终实现Alice和Bob之间量子态的交换,通过双通道的隐形传输,验证了所提准则的可行性并给出量子通道选择的一般方法.

In order to achieve controlled bidirectional quantum teleportation of two qubits,based on tensor analysis,von Neumann and Bell basis measurements,we propose criteria for assessing whether an arbitrary nine-qubit entangled state can be used as quantum channel for controlled bidirectional quantum teleportation.Using such a channel,the controller performs a von Neumann measurement,dividing the initial quantum channel into single,dual,triple and quadruple channel.In order to achieve CBQT of two qubits using the proposed criteria,taking the dual channel as an example,Alice,Bob,and the controller work together,using von Neumann measurement,Bell basis measurements,and finally unitary transformations.we verify the feasibility of the proposed standard and set out a general quantum channel selection method.