String Theory & LQG: Explaining Particles & Forces

LQG has also been unable to reproduce the Standard Model of particle physics. It is not clear how LQG could account for the zoo of particles we observe.
  • #1
Eh
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In string theory, all particles and forces of nature of mere results of vibrating strings. Can LQG offer an alternative explanation for the zoo of particles we find? I seem to recall reading that the theory proposes that quarks are where edges of the lattice intersect, but I can't recall where. Is this correct, and has any progress been made in explaining the source of the forces?
 
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  • #2
Originally posted by Eh
In string theory, all particles and forces of nature of mere results of vibrating strings. Can LQG offer an alternative explanation for the zoo of particles we find?

Ideas about how to move beyond pure gravity LQG are vague. The most natural (vague) idea is problematic: LQG black hole entropy calculations appear to indicate insufficient room in LQG for any other particles.
 

1. What is string theory and LQG?

String theory and LQG (Loop Quantum Gravity) are two competing theories that attempt to explain the fundamental nature of particles and forces in the universe. String theory proposes that particles are made up of tiny, vibrating strings, while LQG suggests that the universe is made up of discrete, indivisible units called quanta.

2. How do string theory and LQG explain particles and forces?

String theory and LQG both attempt to explain particles and forces by providing a framework for understanding the fundamental building blocks of the universe. String theory describes particles as different vibrations of strings, while LQG explains them as interactions between quanta of space and time.

3. What is the main difference between string theory and LQG?

The main difference between string theory and LQG is their approach to understanding the fundamental nature of the universe. String theory is a mathematical model based on the idea of strings, while LQG is a quantum theory that describes space and time as discrete units.

4. Are there any experimental evidence for string theory and LQG?

Currently, there is no direct experimental evidence for either string theory or LQG. However, both theories are still being actively researched and studied in hopes of finding evidence to support them.

5. Can string theory and LQG be reconciled?

There have been attempts to reconcile string theory and LQG, but so far, no unified theory has been developed. Some physicists believe that a combination of both theories may be necessary to fully explain the universe, while others argue that they are fundamentally incompatible.

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