Quantum gravity and worldlines

In summary, the conversation discusses the goals of quantum gravity, specifically the unification of quantum mechanics and general relativity, and the possibility of understanding the "worldliness" of quantum particles through quantum gravity. Different QG programs are mentioned, but no satisfactory answer is provided. The thread is closed due to a similar discussion on a previous thread.
  • #1
cube137
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10
[Mentor's note: moved frpm a different thread]

I need to know something quick and don't want a new thread. The number one goal of quantum gravity is uniting them in a region where both occur (like in singularities). Another goal is quantum spacetime. I'd like to know if quantum gravity would enable us to know the worldliness of quantum particles. In classical general relativity. It doesn't do that. But then is it possible that in spite of a future full theory of quantum gravity. We still won't have worldliness of quantum particles? How do different QG programs handle this?
 
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  • #2
cube137 said:
is it possible that in spite of a future full theory of quantum gravity. We still won't have worldliness of quantum particles?
yes.
How do different QG programs handle this?
I doubt that there is a satisfactory answer beyond the one you've already seen: https://www.physicsforums.com/threads/gr-worldlines-of-a-particle.907298/

This thread is closed for the same reason as that one.
 

Related to Quantum gravity and worldlines

1. What is quantum gravity and how is it different from classical gravity?

Quantum gravity is a theoretical framework that attempts to reconcile the principles of quantum mechanics with the theory of general relativity, which explains the force of gravity in terms of the curvature of space and time. It is different from classical gravity because it takes into account the microscopic behavior of particles and the uncertainty principle, which states that the position and momentum of a particle cannot be known simultaneously.

2. How does quantum gravity relate to the concept of worldlines?

Worldlines are a way of representing the path of a particle through spacetime. In quantum gravity, the concept of worldlines is used to describe the behavior of particles at the quantum level, where they can exist in multiple states simultaneously and their paths cannot be predicted with certainty.

3. What are the challenges in developing a theory of quantum gravity?

One of the main challenges in developing a theory of quantum gravity is the fact that it requires combining two theories that are fundamentally different and have different mathematical frameworks. Additionally, there are still many unanswered questions about the behavior of particles at the quantum level and how they interact with gravity.

4. How do scientists study quantum gravity and worldlines?

Scientists study quantum gravity and worldlines through a combination of theoretical and experimental research. Theoretical physicists use mathematical models and simulations to explore the behavior of particles and test different theories. Experimental physicists conduct experiments to gather data and test the predictions of these theories.

5. What are some potential applications of a theory of quantum gravity and worldlines?

A successful theory of quantum gravity and worldlines could have a wide range of applications, including helping us better understand the fundamental nature of the universe, explaining the behavior of black holes, and potentially leading to new technologies such as quantum computers. It could also have practical applications in fields such as cosmology and particle physics.

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