Quantum mechanics and relativity

AI Thread Summary
General relativity and quantum mechanics cannot both be complete in their current forms if a unified theory is to be established. Quantum entanglement does not imply faster-than-light travel, as it does not involve any physical signal transmission. The main challenge lies in integrating gravity with quantum field theory, particularly in extreme conditions like the big bang or inside black holes. Both theories have proven effective within their domains, but a unified theory must reconcile their differences and extend beyond their current limitations. Achieving this integration remains a significant hurdle in theoretical physics.
johann1301
Messages
216
Reaction score
1
After what i have heard, General relativity and quantum mechanics can't both be correct if there is a unified theory.

Is this because quantum entanglement propose that "something" is traveling faster than light or is it something else?
 
Physics news on Phys.org
johann1301 said:
After what i have heard, General relativity and quantum mechanics can't both be correct if there is a unified theory.

Is this because quantum entanglement propose that "something" is traveling faster than light or is it something else?

It has nothing to do with that. Quantum entanglement does not break the speed of light because nothing is traveling! In fact, there have been several threads discussing why you cannot use this phenomenon to send faster than light signals.

The problem arises in the difficulty we have so far to incorporate gravity into something that resembles our description of quantum field theory.

Zz.
 
Thanks:)
 
johann1301 said:
After what i have heard, General relativity and quantum mechanics can't both be correct if there is a unified theory.

It might be better to say "complete" rather than "correct". Both QM and GR have proven quite capable of delivering correct results everywhere that they're applicable. A unified theory will have to agree with them everywhere that they're applicable, but will also (we hope) deliver results in areas where neither GM nor QM do so today.
 
The main difficulty is that where QM and GR both apply (at big bang or inside black hole) they won't work together.
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »
Thread 'Beam on an inclined plane'

Thread 'Beam on an inclined plane'

Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
View full post »

Similar threads

Thoughts on neural networks "discovering" physical concepts
Replies
6
Views
1K
A Multi-scale Decoherence and the Quantum-to-Classical Transition
Replies
3
Views
2K
I How can Bohmian mechanics explain entanglement?
2
Replies
57
Views
3K
I What if unification does not work?
Replies
28
Views
5K
Can ChatGPT Handle Complex Physics Questions Accurately?
4
Replies
190
Views
15K
Quantum Quantum Textbook For Density Matrix, Pure & Mixed States, +more
Replies
2
Views
3K
Insights How Quantum Information Theory Solves “the only mystery” of Quantum Mechanics
Replies
1
Views
4K
I Lagrangian Mechanics, Continuous Particle Paths and QFT
Replies
6
Views
1K
Physics Enthusiast
Replies
1
Views
756
My Physics Professor says Newton's laws are wrong?
Replies
27
Views
8K

Hot Threads

Recent Insights

Back
Top