There exist non orthogonal quantum measurements that are perfectly repeatable
量子物理
2007-05-23 v2
摘要
We show that, contrarily to the widespread belief, in quantum mechanics repeatable measurements are not necessarily described by orthogonal projectors--the customary paradigm of "observable". Nonorthogonal repeatability, however, occurs only for infinite dimensions. We also show that when a non orthogonal repeatable measurement is performed, the measured system retains some "memory" of the number of times that the measurement has been performed.
引用
@article{arxiv.quant-ph/0310041,
title = {There exist non orthogonal quantum measurements that are perfectly repeatable},
author = {F. Buscemi and G. M. D'Ariano and P. Perinotti},
journal= {arXiv preprint arXiv:quant-ph/0310041},
year = {2007}
}
备注
4 pages, 1 figure, revtex4, minor changes