论文标题
广播一组受限的Qubit和Qutrit状态
Broadcast of a restricted set of qubit and qutrit states
论文作者
论文摘要
无关定理禁止将未知状态的分布到一个以上的接收器。但是，如果发件人知道状态，并且从限制的可能性中选择了状态，则可以使用称为远程状态准备的程序来广播状态。在这里，我们检查了一个远程状态准备协议，该协议可用于将量子的状态（仅限于Bloch Sphere的赤道）发送给任意数量的接收器。纠缠成本少于使用传送来完成相同任务的成本。我们在此任务上介绍了许多变体，概率地将未知的Qubit状态发送给两个接收器，将不同的量子状态发送给两个接收器，并将Qutrit状态发送到两个接收器。最后，我们讨论了这些协议的一些应用。
The no-cloning theorem forbids the distribution of an unknown state to more than one receiver. However, if the sender knows the state, and the state is chosen from a restricted set of possibilities, a procedure known as remote state preparation can be used to broadcast a state. Here we examine a remote state preparation protocol that can be used to send the state of a qubit, confined to the equator of the Bloch sphere, to an arbitrary number of receivers. The entanglement cost is less than that of using teleportation to accomplish the same task. We present a number of variations on this task, probabilistically sending an unknown qubit state to two receivers, sending different qubit states to two receivers, and sending qutrit states to two receivers. Finally, we discuss some applications of these protocols.
