Although perfect copying of an unknown quantum state is not possible, approximate cloning is possible in quantum mechanics. Quantum telecloning is a variant of approximate quantum cloning which uses quantum teleportation to allow for the use of classical communication to create physically separate clones of a quantum state. We present results of a of $1 \rightarrow 9$ universal, symmetric, optimal quantum telecloning implementation on a cloud accessible quantum computer - the Quantinuum H1-1 device. The H1-1 device allows direct creation of the telecloning protocol due to real time classical if-statements that are conditional on the mid-circuit measurement outcome of a Bell measurement. In this implementation, we also provide an improvement over previous work for the circuit model description of quantum telecloning, which reduces the required gate depth and gate count for an all-to-all connectivity. The demonstration of creating $9$ approximate clones on a quantum processor is the largest number of clones that has been generated, telecloning or otherwise.
翻译:虽然不可能完全复制未知量子状态,但在量子力学中,大约的克隆是可能的。量子力学是近似量子克隆的一种变体,它使用量子传送,以便利用古典通信来制造物理上分离的量子状态克隆。我们介绍了在云可获取量子计算机(Quantinuum H1-1-1装置)上实施1美元的全方位、对称和最佳量子离心仪的结果。H1-1-1装置允许直接创建电线克隆协议,因为实时古典的假设是以贝尔测量的中路测量结果为条件的。在这个执行过程中,我们还改进了以前关于量子电离心的电图模型描述的工作,该模型描述降低了所需的门深度和全通连接的门数。在量子处理器上创建9美元的近似克隆是生成、电传或其他最多克隆的证明。