All Questions
Tagged with non-locality causality
18
questions
0
votes
2
answers
130
views
Can a non-local theory be consistent with special relativity?
If there was a non-local theory that explained quantum entanglement correlations, does it follow that it would violate special relativity?
- 1
0
votes
1
answer
148
views
Newton's second law - local laws and non-local laws
What are local laws? I was reading this line in a book...
Newtons second law is a local law. This means that it applies to a particle at a particular instant without taking into consideration any ...
- 13
1
vote
1
answer
222
views
Does a nonlocal deterministic hidden variable theory imply retrocausality?
I've had this idea for a while, and recently I stumbled upon a short paper from N. Gisin that formulated this idea, but I could not find a meaningful discussion on the problem. The paper that I found ...
- 35
4
votes
2
answers
290
views
Why is quantum non-locality so surprising when quantum mechanics is a non-relativistic theory to begin with?
Ignore the fact that Quantum Field Theory (QFT) is compatible with Special Relativity (SR) for a second. Imagine we are back in a time before the construction of QFT. If Quantum Mechanics (QM) is the ...
2
votes
1
answer
148
views
Is there something that violates "time locality"?
The way I understand locality is that for an object to influence another object away from it, it has to do so through the space that separates them. It can shoot out an EM wave to the other object, ...
0
votes
1
answer
61
views
Does non-local interepretations of quantum mechanics imply FTL communication? [closed]
For example the pilot wave theory... And if this is the case then does FTL commuincation imply time travel (i.e: information going back in time).
0
votes
1
answer
79
views
Quantum Erasure - what causes the phase difference in the two interference patterns observable at Do?
In the Delayed Quantum Erasure experiment, I understand that the interference patterns that you would see at Do is associated to the entangled photons that eventually arrive at D1 or D2 (which-way ...
- 391
2
votes
1
answer
114
views
Are following statements valid for quantum gravity?
In the concluding section of this post user Chiral Anomaly states following:
On the other hand, since any stable marriage of quantum theory and gravity (in the sense of general relativity, not just ...
- 3,043
-1
votes
1
answer
281
views
Particle picture in position space in quantum field theory
When I operate $a^{\dagger}_k$ on vacuum, $|0\rangle$, I get a particle created in momentum space with a 4-momentum equal to $(\omega_k, \vec{k})$ where $\omega_k=\sqrt{m^2+\vec{k}^2}$ here I'm only ...
- 3,043
3
votes
2
answers
282
views
Can non-locality be considered an instantaneous propagation of the field?
I've read the article Quantum Entanglement, which is a summary of the basics of non-locality, as well a claim for the first "real" proof of its existence. I also have some background from self-...
user198207
4
votes
2
answers
199
views
How to deduce quantum non-locality from indeterminism?
In the paper ''Quantum non-locality as an axiom'' (Popescu, S. & Rohrlich, D. Found Phys (1994) 24: 379. https://doi.org/10.1007/BF02058098), it is stated that the conventional formalism of ...
user191891
0
votes
0
answers
235
views
Quantum Mechanics Vs nonlocal causality
There is an article in Physics world.com dated August 18, 2016, titled "Quantum Mechanics Trumps Nonlocal Causality. The author of the article Philip Ball quotes one of the experimenters ( i.e. ...
user86411
2
votes
2
answers
299
views
How is locality preserved in quantum mechanics?
I was reading this post:
http://motls.blogspot.com/2015/06/locality-nonlocality-and-anti-quantum.html
Specifically here: "There is no nonlocality. There is no action at a distance. There is no doubt ...
- 1,224
2
votes
0
answers
249
views
Amplitude for a string to propagate from one point to another
In Zwiebach’s book sections 12.6 and 12.7 interesting aspects of the wave function of the string are discussed. In order to introduce my question first recall what happens with the relativistic ...
- 1,714
9
votes
1
answer
1k
views
Delocalization in the square root version of Klein-Gordon equation
In this Wikipedia article a relativistic wave equation is derived using the Hamiltonian
$$H=\sqrt{\textbf{p}^2 c^2 + m^2 c^4}$$
Substituting this into the Schrödinger equation gives the square root ...
- 1,714