论文标题
使用NMR量子均匀的蛋白转化纯净和混合状态
Transforming pure and mixed states using an NMR quantum homogeniser
论文作者
论文摘要
通用量子均匀的人可以以任意准确的态度将量子器从任何状态转换为任何其他状态，仅使用单一转换来执行此任务。在这里，我们提出了使用四个QUIT系统的核磁共振（NMR）的有限量子均匀的实现。我们将混合状态与纯状态的均匀化和反向过程进行比较。在考虑了系统中的破坏作用之后，我们发现实验结果与量子态在两种情况下如何发展的理论对称性一致。我们通过将均匀分散器解释为纯状态制备和信息争夺的物理实施来分析这种对称性的含义。
The universal quantum homogeniser can transform a qubit from any state to any other state with arbitrary accuracy, using only unitary transformations to perform this task. Here we present an implementation of a finite quantum homogeniser using nuclear magnetic resonance (NMR), with a four-qubit system. We compare the homogenisation of a mixed state to a pure state, and the reverse process. After accounting for the effects of decoherence in the system, we find the experimental results to be consistent with the theoretical symmetry in how the qubit states evolve in the two cases. We analyse the implications of this symmetry by interpreting the homogeniser as a physical implementation of pure state preparation and information scrambling.
