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
中图分类号
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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