Examples of conditional SIC-POVMs
Examples of conditional SIC-POVMs
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条件 SIC-POVM 的示例
DOI：
10.1007/s11128-015-1085-y
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发表时间：
2015
影响因子：
2.5
通讯作者：
Denes Petz
中科院分区：
文献类型：
--
作者：
Hiromichi Ohno;Denes Petz
量子系统的状态是具有多个参数的密度矩阵。这里关心的是如何恢复参数。最佳恢复方法存在多种可能性，我们考虑一些特殊情况。我们假设一些参数是已知的，而其他参数将被恢复。用于在附加条件下恢复未知参数的最优正算子值测度 (POVM) 称为条件对称信息完备 POVM (SIC-POVM)。在本文中，我们研究条件 SIC-POVM 是否存在。我们提供了存在的必要条件和一些例子。
The state of a quantum system is a density matrix with several parameters. The concern herein is how to recover the parameters. Several possibilities exist for the optimal recovery method, and we consider some special cases. We assume that a few parameters are known and that the others are to be recovered. The optimal positive-operator-valued measure (POVM) for recovering unknown parameters with an additional condition is called a conditional symmetric informationally complete POVM (SIC-POVM). In this paper, we study the existence or nonexistence of conditional SIC-POVMs. We provide a necessary condition for existence and some examples.