Is There an Anti-Universe and Do Antimatter Particles Effect Themselves?

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Discussion Overview

The discussion revolves around the concept of an "anti-universe," the effects of antimatter particles on themselves, and related questions about gravity and massless particles. Participants explore theoretical implications and speculative ideas without reaching definitive conclusions.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions the existence of an "anti-universe" and suggests that if every action has an equal and opposite reaction, the creation of matter would necessitate an opposite reaction.
  • Another participant proposes that the concept of an anti-universe is a speculative idea, noting that there is no fundamental difference between matter and antimatter, and that both could theoretically exist in parallel universes.
  • It is suggested that if an anti-universe exists, it might have been created alongside our universe during the Big Bang, with each moving in different temporal directions.
  • Participants discuss the idea that antimatter particles could annihilate themselves, resulting in energy, while also questioning the existence and gravitational effects of massless particles.

Areas of Agreement / Disagreement

Participants express differing views on the existence and implications of an anti-universe, with no consensus reached on the validity of these concepts or their scientific grounding.

Contextual Notes

The discussion includes speculative hypotheses that lack empirical verification and relies on assumptions about the nature of matter, antimatter, and gravity.

chuckosity
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Here are several perplexing questions that i have been pondering recently and i really don't know who I would ask this so I am just asking everywhere. since every action has an equal and opposite reaction is there an anti-universe does gravity effect itself? is there anti gravity? do antimatter particles effect itself by destroying itself into nothing? do massless particles exist an do they effect each other gravitation wise?
 
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What is an "anti-universe" ? Is that something you just dreamed up?
 
ya but think about it if every action has an equal and opposite action wouldn't the creation of matter have to have a opposite reaction?
 
chuckosity said:
ya but think about it if every action has an equal and opposite action wouldn't the creation of matter have to have a opposite reaction?

Welcome to PhysicsForums, chuckosity!

You have a good question, and I have often wondered the same thing (just the part about an anti-universe). I actually think it is "possible". This is what is often called an "ad hoc" hypothesis. Which is to say we dream it up knowing there is no real way to check it out.

There is no fundamental difference between matter and anti-matter. You could call our universe "anti-matter" and there would be no meaningful difference in what we would witness in experiments. It is *possible* that the big bang created both a universe and an anti-universe. Were that the case, each would go a different direction in time. However, this idea is completely speculative and we have no way to verify the idea. As such, that essentially puts it outside the realm of normal science.

As to particles and anti-particles destroying themselves into nothing: there IS something that results, and that is energy. Energy is conserved. Also: Massless particles DO have a connection to the gravitational field. Good questions, you should keep reading about this and learn more.
 

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