A Pair Of Quanta Cannot Be Wed
Quantum Physics
2008-02-13 v1
Abstract
Wooters, Zurek and others have shown that "A Single Quantum Cannot Be Cloned". The reason is two-fold: 1. A quantum cloner would permit FTL signaling; 2. A quantum cloner would violate the linearity requirement for quantum superposition. I present here a similar proof that two arbitrary quantum states cannot be universally welded together to produce a double quantum state. In particular, opposite polarization states cannot be perfectly merged. This paper closes another FTL loophole and discloses a new law of nature: Perfect quantum weddings are not possible.
Keywords
Cite
@article{arxiv.0802.1536,
title = {A Pair Of Quanta Cannot Be Wed},
author = {Nick Herbert},
journal= {arXiv preprint arXiv:0802.1536},
year = {2008}
}
Comments
6 pages, no figures