计算机科学 ›› 2022, Vol. 49 ›› Issue (6A): 645-648.doi: 10.11896/jsjkx.210400214
Renata WONG
Renata WONG
摘要: 当今量子算法的一个发展方向是对早期量子算法的再思考。在量子计算领域,每一种早期量子算法都提出了突破性概念。一般认为它们在很大程度上仅属理论范畴,原因它们所求解的问题几乎都没有实用价值。但这些早期量子算法依然重要,因为它们在解决问题的速度上相比经典算法呈指数级别的增长。文中做了两件工作:一方面详细阐述对早期量子算法再思考的最新进展,另一方面则对早期量子算法进行所谓的重新目的化,即重新用于量子密钥分发、纠错等领域。Deutsch-Jozsa算法、Bernstein-Vazirani算法和Simon算法是关注的重点。Deutsch-Jozsa算法用于判定多引数函数(Multi-argument Function)是平衡的还是常数的。最近的研究表明,其应用可以扩展到量子通信和形式语言(Formal Languages)领域。Bernstein-Vazirani算法能够搜索出在函数中编码的字符串,其应用可以扩展至量子密钥分发领域和通信中对信息的纠错处理。Simon算法则用于求解具有特定属性字符串的识别问题,它的现代应用包括量子通信和纠错。
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