Withdrawn by the authors. Since the elements within each period of function hA are not distinct, period finding cannot operate properly. Thanks to all for the comments and sorry for the inconvenience
Withdrawn by the authors. Since the elements within each period of function hA are not distinct, period finding cannot operate properly. Thanks to all for the comments and sorry for the inconvenience.
有没有一个普遍的定理告诉我们,什么时候我们可以希望量子算法的加速达到指数级,什么时候我们不能?在本文中,我们在大多数量子算法运行的黑箱模型中对这样一个定理进行了两个改进。首先,我们证明了对于任何在置换输入和输出下不变的问题(如碰撞或元素独特性问题),量子查询复杂度至少是经典随机查询复杂度的7次方根。(An这篇文章的早期版本给出了9次根。这解决了Watrous在2002年提出的一个猜想。其次,受O 'Donnell et al.(2005)和Dinur et al.(2006)最近工作的启发,我们猜想每个有界低次多项式都有一个“高度影响”的变量。假设这个猜想,我们证明了每个T-查询量子算法都可以通过poly(T)-查询经典算法在大多数输入上进行模拟,并且基本上不能希望证明P!相对于随机预言机的BQP。
Near-Optimal Quantum Algorithm and Complexity Analysis for Riccati Problems
Tsinghua University(清华大学);TraverseQuantum Co., Ltd.(TraverseQuantum有限公司);Yau Mathematical Sciences Center, Tsinghua University(清华大学丘成桐数学科学中心);Qiuzhen College, Tsinghua University(清华大学邱士泽学院);Institute for AI Industry Research (AIR), Tsinghua University(清华大学人工智能产业研究院);Academy of Mathematics and Systems Science, Chinese Academy of Sciences(中国科学院数学与系统科学研究院);Institute for Applied Mathematics, Tsinghua University(清华大学应用数学中心);Beijing Institute of Mathematical Sciences and Applications(北京国际数学研究中心);Department of Computer Science and Technology, Tsinghua University(清华大学计算机科学与技术系)
Quantum simulation of slow analytic time-dependent Hamiltonians
School of Mathematics and Statistics, Wuhan University(武汉大学数学与统计学院);School of Artificial Intelligence, Wuhan University(武汉大学人工智能学院);Beijing International Center for Mathematical Research, Peking University(北京大学北京国际数学研究中心)