The four postulates of quantum mechanics are three
Quantum Physics
2022-01-12 v2
Abstract
The tensor product postulate of quantum mechanics states that the Hilbert space of a composite system is the tensor product of the components' Hilbert spaces. All current formalizations of quantum mechanics that do not contain this postulate contain some equivalent postulate or assumption (sometimes hidden). Here we give a natural definition of composite system as a set containing the component systems and show how one can logically derive the tensor product rule from the state postulate and from the measurement postulate. In other words, our paper reduces by one the number of postulates necessary to quantum mechanics.
Keywords
Cite
@article{arxiv.2003.11007,
title = {The four postulates of quantum mechanics are three},
author = {Gabriele Carcassi and Lorenzo Maccone and Christine A. Aidala},
journal= {arXiv preprint arXiv:2003.11007},
year = {2022}
}
Comments
4 pages+supplementary information. Final version accepted for publication on Phys. Rev. Lett