Coprocessors for quantum devices
Coprocessors for quantum devices
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DOI：
10.1103/physreva.97.032316
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发表时间：
2017-10
影响因子：
2.9
通讯作者：
A. Kay
中科院分区：
文献类型：
--
作者：
A. Kay
量子设备，从简单的固定功能工具到通用量子计算机的最终目标，将需要高质量，频繁重复一小部分核心操作，例如纠缠态的制备。这些任务非常适合通过协处理器或辅助指令集来实现，这在现代CPU中是常见的做法。在本文中，我们提出了两个典型的量子协处理器功能：GHZ态的生产，和最佳通用（非对称）量子克隆的实现。两者都基于固定汉密尔顿的演化。我们介绍了一种新的技术，用于推导这些哈密顿参数的基础上的数值积分户田流。
Quantum devices, from simple fixed-function tools to the ultimate goal of a universal quantum computer, will require high quality, frequent repetition of a small set of core operations, such as the preparation of entangled states. These tasks are perfectly suited to realisation by a co-processor or supplementary instruction set, as is common practice in modern CPUs. In this paper, we present two quintessentially quantum co-processor functions: production of a GHZ state, and implementation of optimal universal (asymmetric) quantum cloning. Both are based on the evolution of a fixed Hamiltonian. We introduce a new technique for deriving the parameters of these Hamiltonians based on the numerical integration of Toda-like flows.