High relativistic speed + entanglement

In summary, entanglement cannot be used to communicate or send information due to the laws of quantum mechanics and special relativity. Once one particle is detected, the entanglement is broken and changing the spin of one particle has no effect.
  • #1
typical guy
24
0
A thought exercise:
You have entangled particles, leave one on Earth and put the other on a spaceship that is moving close to the speed of light. What happens when you change the rotation of one particle or the other? Given that the speed of light is the speed limit to the universe and that all kinds of things happen with time when you go fast, what exactly would happen if you change the rotation or attempt to "communicate" using entanglement? Is there some upper limit at which you can communicate from one entangled particle to another? Would this result in one particle's destruction?
 
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  • #2
Hi typical guy, welcome to PF.

AFAIK there is no way to use entanglement to communicate or send any information. Since the modern QM laws are Lorentz symmetric entanglement is compatible with special relativity.
 
  • #3
You can't communicate using entanglement at all. Once one of the particles is detected, the particles are no longer entangled, so "changing" the spin of one does absolutely nothing for you.
 

1. What is high relativistic speed?

High relativistic speed refers to the speed at which an object is moving relative to an observer, where the object is moving at a significant fraction of the speed of light. This speed can cause significant changes in the way time and space are perceived, known as time dilation and length contraction.

2. What is entanglement?

Entanglement is a phenomenon in quantum mechanics where two particles become linked in such a way that their properties are dependent on each other, regardless of the distance between them. This means that measuring the properties of one particle will affect the properties of the other, even if they are separated by vast distances.

3. Can entanglement occur at high relativistic speeds?

Yes, entanglement can occur at high relativistic speeds. In fact, some researchers have proposed that entanglement can occur faster than the speed of light, although this is still a subject of debate in the scientific community.

4. How does high relativistic speed affect entanglement?

High relativistic speed can affect entanglement in a few ways. First, it can cause time dilation, which means that the perception of time for an observer moving at high speeds is different from that of an observer at rest. This can affect the timing of measurements on entangled particles. Additionally, it has been theorized that high speeds could cause a breakdown of entanglement, but this has not yet been proven.

5. What are the potential applications of high relativistic speed + entanglement?

There are many potential applications of combining high relativistic speed and entanglement. One potential application is in quantum communication, where entangled particles could be used to transmit information securely over long distances. Another possible application is in quantum computing, where high speeds could be used to perform calculations and solve problems faster than traditional computers.

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