Mixed quantum state of the Bose-Einstein distribution

[Bertt]

Why is the quantum state of the Bose-Einstein distribution mixed and not pure? Is there any mathematical proof on this?

 

[PeterDonis]

he quantum state of the Bose-Einstein distribution

What quantum state are you talking about? Do you have a reference?

 

[Bertt]

What quantum state are you talking about? Do you have a reference?

See e.g. these course notes:

https://ocw.mit.edu/courses/22-51-q...e9b8a81b64613f1428e87cb00_MIT22_51F12_Ch7.pdf

In particular, I'm asking for a mathematical demonstration regarding a Bose-Einstein distribution.

Thank you.

 

[PeterDonis]

See e.g. these course notes

Where do these notes talk about a Bose-Einstein distribution? What makes you think the "Bose-Einstein distribution" is a mixed quantum state?