Conditions for Nondistortion Interrogation of Quantum System
Quantum Physics
2009-11-07 v3
Abstract
Under some physical considerations, we present a universal formulation to study the possibility of localizing a quantum object in a given region without disturbing its unknown internal state. When the interaction between the object and probe wave function takes place only once, we prove the necessary and sufficient condition that the object's presence can be detected in an initial state preserving way. Meanwhile, a conditioned optimal interrogation probability is obtained.
Keywords
Cite
@article{arxiv.quant-ph/0103102,
title = {Conditions for Nondistortion Interrogation of Quantum System},
author = {Zheng-Wei Zhou and Xingxiang Zhou and Marc J. Feldman and Guang-Can Guo},
journal= {arXiv preprint arXiv:quant-ph/0103102},
year = {2009}
}
Comments
5 pages, Revtex, 1 figures, Presentation improved, corollary 1 added. To appear in Europhysics Letters