Entanglement, discord, and the power of quantum computation
Entanglement, discord, and the power of quantum computation
复制标题
DOI：
10.1103/physreva.83.010301
复制
发表时间：
2010-09
影响因子：
2.9
通讯作者：
Aharon Brodutch;Daniel R. Terno
中科院分区：
文献类型：
--
作者：
Aharon Brodutch;Daniel R. Terno
我们表明，即使当它们被应用于非纠缠态，并没有产生纠缠时，产生纠缠的能力是必要的执行二分量子门。从一个简单的例子开始，我们证明了要执行这样的门双本地的本地操作和经典通信（LOCC）应补充共享纠缠。我们的研究结果指出，量子不和谐的变化，这是一个衡量量子的相关性，即使在没有纠缠，作为失败的LOCC实现的门的指标。
We show that the ability to create entanglement is necessary for execution of bipartite quantum gates even when they are applied to unentangled states and create no entanglement. Starting with a simple example we demonstrate that to execute such a gate bilocally the local operations and classical communications (LOCC) should be supplemented by shared entanglement. Our results point to the changes in quantum discord, which is a measure of quantumness of correlations even in the absence of entanglement, as the indicator of failure of a LOCC implementation of the gates.