Model of a Joint Measurement of Different Spin Components

被引：0
|
作者：
Peter Kienzler
机构：
来源：
International Journal of Theoretical Physics | 1998年 / 37卷
关键词：
Magnetic Field; Field Theory; Elementary Particle; Quantum Field Theory; Type Experiment;
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暂无
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学科分类号：
摘要：
A Stern-Gerlach type experiment is presented asan unsharp joint measurement of spin components. Usinga simple realistic magnetic field, the interactionHamiltonian reads H = μ(–σxx+ σzz). In the framework of operational quantum physicsthe apparatus is represented by a Gaussian-shaped wavefunction. The probability reproducibility conditionleads to the nearly best joint spin-x-z- observable formulated as a positive operator-valuedmeasure. Observable and measurement are discussed withinthe quantum theory of measurement.
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页码：257 / 263
页数：6
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