My discussions with John Bell about reality in quantum mechanics are recollected. I would like to introduce the reader to Bell’s vision of reality which was for him a natural position for a scientist. Bell had a strong aversion against “quantum jumps” and insisted to be clear in phrasing quantum mechanics, his “words to be forbidden” proclaimed with seriousness and wit – both typical Bell characteristics – became legendary. I will summarize the Bell-type experiments and what Nature responded, and discuss the implications for the physical quantities considered, the real entities and the nonlocality concept due to Bell’s work. Subsequently, I also explain a quite different view of the meaning of a quantum state, this is the information theoretic approach, focusing on the work of Brukner and Zeilinger. Finally, I would like to broaden and contrast the reality discussion with the concept of “virtuality,” with the meaning of virtual particle occurring in quantum field theory. With some of my own thoughts I will conclude the paper which is composed more as a historical article than as a philosophical one.

我与约翰·贝尔（John Bell）关于量子力学中的现实的讨论被重新记录。我想向读者介绍贝尔对现实的看法，这对他来说是科学家的自然立场。贝尔对“量子跃迁”有强烈的反感，并坚持在措辞量子力学方面要明确，他以严肃和机智宣称的“禁言”（都是贝尔的典型特征）成为传奇。我将总结贝尔型实验以及自然界的反应，并讨论对所考虑的物理量，实际实体和非本地性概念（由于贝尔的工作）。随后，我还解释了关于量子态含义的一种截然不同的观点，这是信息理论方法，重点关注布鲁克纳和齐林格的工作。最后，我想用“虚拟性”的概念来扩展和对比现实的讨论，以及在量子场论中出现的虚拟粒子的含义。基于我自己的一些想法，我将得出本文的结论，该论文的内容更多是作为历史文章而不是哲学文章。