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Unitary evolution to a state with a fixed mean number of particles
International Journal of Modern Physics A ( IF 1.6 ) Pub Date : 2020-11-21 , DOI: 10.1142/s0217751x20502139
Bogusław Broda 1
Affiliation  

In the framework of finite-dimensional Fock space models, for a predefined fixed mean number of particles [Formula: see text], it is shown that there is a “large” multidimensional subspace [Formula: see text] of initial pure states, in the space [Formula: see text] of all pure states, unitarily evolving to a subspace [Formula: see text] of final pure states which yield [Formula: see text]. As an example, in particular it follows that the blackbody form of the mean number of particles [Formula: see text] does not by itself contradict unitarity of black hole evaporation.

中文翻译:

单一演化到具有固定平均粒子数的状态

在有限维 Fock 空间模型的框架中,对于预定义的固定平均粒子数 [公式:见正文],表明存在初始纯态的“大”多维子空间 [公式:见正文],在所有纯态的空间[公式:见文本],统一演变为最终纯态的子空间[公式:见文本],产生[公式:见文本]。作为一个例子,特别是它得出的平均粒子数的黑体形式[公式:见正文]本身并不与黑洞蒸发的单一性相矛盾。
更新日期:2020-11-21
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