arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0310038quant-ph
收藏

单比特量子信息的指数加速:测试量子蝴蝶效应

Exponential speed-up with a single bit of quantum information: Testing the quantum butterfly effect

David Poulin, Robin Blume-Kohout, Raymond Laflamme, Harold Ollivier

摘要:

我们提出了一个有效的量子算法,利用单个比特的量子信息测量微扰下量子映射的平均保真度衰减。我们的算法的规模只作为调查中的地图的复杂性,所以对于那些地图承认一个有效的门分解,它提供了一个指数级的速度超过已知的经典程序。保真度衰减在复杂动力学系统的研究中具有重要意义,它被认为是量子混沌的一个特征。我们的结果也说明了混沌在退相干过程中的作用。

英文摘要:

We present an efficient quantum algorithm to measure the average fidelity decay of a quantum map under perturbation using a single bit of quantum information. Our algorithm scales only as the complexity of the map under investigation, so for those maps admitting an efficient gate decomposition, it provides an exponential speed up over known classical procedures. Fidelity decay is important in the study of complex dynamical systems, where it is conjectured to be a signature of quantum chaos. Our result also illustrates the role of chaos in the process of decoherence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑