Quantum candies (qandies) is a pedagogical simple model which describes many concepts from quantum information processing (QIP) intuitively, without the need to understand or make use of superpositions, and without the need of using complex algebra. One of the topics in quantum cryptography which gains research attention in recent years is quantum digital signatures (QDS), involving protocols to securely sign classical bits using quantum methods. In this paper we show how the "qandy model" can be used to describe three QDS protocols, in order to provide an important and potentially practical example of the power of "superpositionless" quantum information processing, for individuals without background knowledge in the field.

翻译：量子甘蔗(qandies)是一种教学简单模型,它直观地描述量子信息处理(QIP)的许多概念,不需要理解或使用叠加位置,也不需要使用复杂的代数。量子加密学中近年来引起研究关注的一个专题是量子数字签字(QDS),涉及使用量子方法安全签名古典比特的协议。在本文中,我们展示了“qandy 模型”如何用于描述三种量子信息处理程序,以便为没有实地背景知识的个人提供一个重要和可能实用的例子,说明“超易投”量子信息处理的力量。