You may find the idea of "charge as a pump" appealing; fair enough. I am at a loss to see why that is a reason for thinking that T symmetry is simpler than CPT symmetry.
Well, if true, it is a reason to think T symmetry or PT symmetry holds - since then charge would reverse itself automatically if T was reversed.
Depending on the nature of the pump. For instance, a pump made out of Standard Model stuff would not exactly reverse itself if T were reversed. Presumably, then, you have something more specific in mind; would you care to say more exactly what it is?
http://lifeboat.com/blog/2011/06/dear-dr-hawking
Hey guys, my quantum physics is not powerful enough to understand this guy... Can anyone help me out with this one?
Thanks LW