Sequential products of quantum measurements

被引：12
|
作者：
Gudder, Stan [1 ]
机构：
[1] Univ Denver, Dept Math, Denver, CO 80208 USA
来源：
REPORTS ON MATHEMATICAL PHYSICS | 2007年 / 60卷 / 02期
关键词：
sequential products; quantum measurements; quantum effects; positive operators;
D O I：
10.1016/S0034-4877(07)80139-X
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Sequential products of quantum measurements are defined and studied. Two types of measurement equivalence are considered and their relationships with compatibility and the sequential product are discussed. It is shown that a measurement A is sharp if and only if A is equivalent to the sequential product of A with itself. Refinements of measurements are defined and it is shown that they produce a partial order on the set of measurements. Lattice properties of this partially ordered set are briefly discussed. Finally we consider convex combinations and conditioning for quantum measurements.
引用
收藏
页码：273 / 288
页数：16
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