arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0006006quant-ph
收藏

普适量子估计的可观测量定额

Quorum of observables for universal quantum estimation

G. Mauro D'Ariano, Lorenzo Maccone, Matteo G. A. Paris

摘要:

用于估计任意算子(可观测量或不可观测量,包括密度矩阵)的系综平均的任何方法将感兴趣的量与可观测量的完整集合(即,法定量)相关联。这对应于在刘维尔空间中不可约算子集上的展开。我们给出了这些集合的两个一般特征。所有已知的无偏重建技术,即“量子断层摄影”,可以在这个框架中描述。新的操作决议,可用于实现新的重建计划。

英文摘要:

Any method for estimating the ensemble average of arbitrary operator (observables or not, including the density matrix) relates the quantity of interest to a complete set of observables, i.e. a quorum}. This corresponds to an expansion on an irreducible set of operators in the Liouville space. We give two general characterizations of these sets. All the known unbiased reconstruction techniques, i.e. ``quantum tomographies'', can be described in this framework. New operatorial resolutions are given that can be used to implement novel reconstruction schemes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑