Today I was thinking, Since Positron has a negative energy according to Dirac and it can be interpreted as an Electron going back in time, what would happen to the entropy of a system made out of antimatter? Is it decrease over relative time ? Is a world made of antimatter is just the past relative to present of a world of matter? After all Positron is just an Electron with the opposite energy and same spin. An Electron move back and forth in time changing into Positron and back.
Follow up: "Anti-matter and time"
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