I Is Time Travel Possible with Entangled Particles?

Click For Summary
The discussion centers on the implications of entangled particles and their measurements in the context of relativity. It highlights that when two entangled particles are measured, the results are correlated, but the order of measurements can vary based on the observers' reference frames. A scenario is presented where a spaceship and Earth measure entangled particles at different times, leading to potential contradictions regarding the influence of one measurement on the other. The participants clarify that measurements are spacelike separated, meaning no definitive causal relationship exists between them, and correlations depend solely on the entangled state. Ultimately, the conversation emphasizes the complexities of quantum mechanics and relativity without allowing for faster-than-light communication.
  • #31
snuz2001 said:
So what is the answer? Can Bob’s late measurement affected Alice’s earlier?

Nobody knows the answer. At least one QM interpretation, retrocausality, allows later measurements to affect earlier ones. Nobody has found a way to experimentally test one QM interpretation vs. another, so as far as anyone knows retrocausality is still a possibility, at least in principle.

I know you would like there to be a definitive answer, but as has already been pointed out several times, this is one of those cases where we don't have one at our current state of knowledge.
 
  • Like
Likes PeroK
Physics news on Phys.org
  • #32
The OP question has been addressed as well as it can be. Thread closed.
 

Similar threads

I Quantum Entanglement and Synchronization
  • · Replies 6 ·
Replies
6
Views
406
A Is entanglement also for time-like intervals?
  • · Replies 3 ·
Replies
3
Views
2K
I What happens to the other particle in an entanglement state?
  • · Replies 8 ·
Replies
8
Views
2K
B Quantum entanglement and simultaneity
  • · Replies 4 ·
Replies
4
Views
3K
I The Extended Wigner's Friend Scenarios
  • · Replies 42 ·
2
Replies
42
Views
3K
I Parallel transport and entanglement
  • · Replies 5 ·
Replies
5
Views
1K
A Is delayed choice remote entanglement of photons derived from TDSE?
  • · Replies 58 ·
2
Replies
58
Views
4K
I Delay in signaling between entanglement particles
  • · Replies 7 ·
Replies
7
Views
1K
B Quantum Entanglement information transmission idea to knock down....
  • · Replies 41 ·
2
Replies
41
Views
5K
I Using a single particle as quantum computer
  • · Replies 8 ·
Replies
8
Views
1K