CPT-Symmetric Universe

Understand

We propose that the state of the universe does {\it not} spontaneously violate CPT.

• Instead, the universe after the big bang is the CPT image of the universe before it, both classically and quantum mechanically.
• The pre- and post-bang epochs comprise a universe/anti-universe pair, emerging from nothing directly into a hot, radiation-dominated era.
• CPT symmetry selects a unique QFT vacuum state on such a spacetime, providing a new interpretation of the cosmological baryon asymmetry, as well as a remarkably economical explanation for the cosmological dark matter.