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In this chapter we will discuss the difference between micro- and macro-states and introduce the statistical operator in quantum mechanics. Observables then are defined by matrix elements within the micro-states and by a statistical average over the ensemble. The differences to the classical density function will be pointed out explicitly.

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Concept of the Statistical Ensemble

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  • 发表日期：

    2025年

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  • Wolfgang Cassing

摘要

In this chapter we will discuss the difference between micro- and macro-states and introduce the statistical operator in quantum mechanics. Observables then are defined by matrix elements within the micro-states and by a statistical average over the ensemble. The differences to the classical density function will be pointed out explicitly.