Contractive Schroedinger cat states for a free mass
摘要
Contractive states for a free quantum particle were introduced by Yuen [Yuen H P 1983 Phys. Rev. Lett. 51, 719] in an attempt to evade the standard quantum limit for repeated position measurements. We show how appropriate families of two- and three component ``Schroedinger cat states'' are able to support non-trivial correlations between the position and momentum observables leading to contractive behavior. The existence of contractive Schroedinger cat states is suggestive of potential novel roles of non-classical states for precision measurement schemes.
引用
@article{arxiv.quant-ph/0303031,
title = {Contractive Schroedinger cat states for a free mass},
author = {Lorenza Viola and Roberto Onofrio},
journal= {arXiv preprint arXiv:quant-ph/0303031},
year = {2009}
}
备注
24 pages, 7 encapsulated eps color figures, REVTeX4 style. Published online in New Journal of Physics 5 (2003) 5.1-5.21. Higher-resolution figures available in published version. (accessible at http://www.njp.org/)