标题： 关于“合理的费米子量子信息理论需要相对论”的评论 显示英文标题

标题： Comment on 'Reasonable fermionic quantum information theories require relativity'

摘要： 在[N. Friis, New J. Phys. 18, 033014 (2016)] 中，考虑了费米子的非相对论描述，并且特别讨论了宇称超选择规则在刻画纠缠关系中的作用。基于自旋-统计联系提出了一种物理动机来解释宇称超选择规则。由于自旋-统计联系是在相对论量子力学背景下推导出来的，因此认为引入宇称超选择规则是由洛伦兹不变性所支持的。基于此进一步指出，费米子量子信息理论与狭义相对论理论在概念上是不可分割的。本文是对宇称超选择规则的一种不同的、已知的且不依赖于相对论量子力学论证的动机进行了说明，而是使用了物理定律对于不同观察者相同以及无信号传递原理的假设。 显示英文摘要

摘要： In [N. Friis, New J. Phys. 18, 033014 (2016)] the non-relativistic description of fermions is considered and in particular the role of the parity superselection rule in relation to the characterization of entanglement. An argument based on the spin-statistics connection is presented as a physical motivation for the parity superselection rule. Since the spin statistics connection was derived in the context of relativistic quantum mechanics it is argued that the inclusion of the parity superselection rule is motivated by Lorentz invariance. Based on this it is further argued that fermionic Quantum Information theory and the theory of special relativity are conceptually inseparable. In this comment a different, and well known, motivation for the parity superselection rule is given that does not rely on arguments from relativistic quantum mechanics, but instead uses the assumptions that the laws of physics are the same for different observers and the no-signalling principle.