Fidelities for transformations of unknown quantum states
量子物理
2007-05-23 v2
摘要
We present a general theoretical formalism to compute the fidelity of transformations of unknown quantum states. We then focus on the case of Gaussian transformations of continuous variable quantum systems, where, for the case of a Gaussian distribution of displaced coherent states, the theory is readily tractable by a covariance matrix formalism. We present analytical results for recently implemented teleportation and memory storage protocols for continuous variables.
引用
@article{arxiv.quant-ph/0512005,
title = {Fidelities for transformations of unknown quantum states},
author = {Lars Bojer Madsen and Klaus Molmer},
journal= {arXiv preprint arXiv:quant-ph/0512005},
year = {2007}
}
备注
8 pages, no figures, accepted for publication In Phys. Rev. A