探索高效线性光学量子计算的新后选择条件
Exploring a New Post-Selection Condition for Efficient Linear Optics Quantum Computation
摘要：
最近，人们发现，理论上有效的量子信息处理的基本门可以通过使用单光子源、线性光学和量子计数器来实现。这些基本门之一是NS门，即单模非线性符号移位。本文首先给出了一个新的严格证明，证明了只有一个辅助光子而辅助模数目不确定的NS门的成功概率的上界为0.25。其次，利用一种新的后选择测度，研究了NS门成功概率的上界。这种新的选择后测量背后的想法是将NS门转换的成功条件设定为在任何输出模式中仅观察到一个辅助光子。
英文摘要：
Recently, it was shown that fundamental gates for theoretically efficient quantum information processing can be realized by using single photon sources, linear optics and quantum counters. One of these fundamental gates is the NS-gate, that is, the one-mode non-linear sign shift. In this work, firstly, we prove by a new rigorous proof that the upper bound of success probability of NS-gates with only one helper photon and an undefined number of ancillary modes is bounded by 0.25. Secondly, we explore the upper bound of success probability of NS-gate with a new post-selection measurement. The idea behind this new post-selection measurement is to condition the success of NS-gate transformation to the observation of only one helper photon in whichever of the output modes.
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。
