Passage from a pure state description to the microcanonical ensemble description for closed quantum systems

Pramana

N D Hari Dass¹  Kalyanarama¹  B Sathiapalan¹ 

[1] Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600 113, India$$

关键词: Ergodicity;    microcanonical;    quantum.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We have addressed the foundational issue of how a macroscopic quantum system starting off as a pure state tends towards a mixed state described by the microcanonical ensemble. The earlier works of von Neumann and Van Kampen are also reviewed. A simple criterion is given as to when the above mentioned passage can take place.

【 授权许可】

Unknown