boffinwannabe said:but if the event is zero secs all observers would see the event the same. Since the point is you are not observing both particles at the same time, just observing one particle at which point you instantly know the state of the other. So i don't see how frame of reference changes anything.
The new hidden influence inequality shows that the get-out won't work when it comes to quantum predictions. To derive their inequality, which sets up a measurement of entanglement between four particles, the researchers considered what behaviours are possible for four particles that are connected by influences that stay hidden and that travel at some arbitrary finite speed. Mathematically (and mind-bogglingly), these constraints define an 80-dimensional object. The testable hidden influence inequality is the boundary of the shadow this 80-dimensional shape casts in 44 dimensions. The researchers showed that quantum predictions can lie outside this boundary, which means they are going against one of the assumptions. Outside the boundary, either the influences can't stay hidden, or they must have infinite speed.
Quantum Nonlocality Based on Finite-speed Causal Influences Leads to Superluminal SignallingThe experimental violation of Bell inequalities using spacelike separated measurements precludes the explanation of quantum correlations through causal influences propagating at subluminal speed. Yet, it is always possible, in principle, to explain such experimental violations through models based on hidden influences propagating at a finite speed v>c, provided v is large enough. Here, we show that for any finite speed v>c, such models predict correlations that can be exploited for faster-than-light communication. This superluminal communication does not require access to any hidden physical quantities, but only the manipulation of measurement devices at the level of our present-day description of quantum experiments. Hence, assuming the impossibility of using quantum non-locality for superluminal communication, we exclude any possible explanation of quantum correlations in term of finite-speed influences.
Entanglement is a phenomenon in quantum mechanics where two or more particles become connected in such a way that the state of one particle can affect the state of the other, even at great distances.
Entanglement occurs when two or more particles interact and become entangled. This can happen through processes such as collisions, interactions with a third particle, or through the creation of multiple particles from a single source.
Entanglement does not occur at a specific speed. It is an instantaneous phenomenon, meaning that the entangled particles are connected regardless of the distance between them. This is known as "spooky action at a distance."
Yes, entanglement can occur between any number of particles. However, as the number of entangled particles increases, the complexity of their interactions also increases.
Entanglement is being explored for use in various technologies such as quantum computing, cryptography, and teleportation. It has the potential to greatly enhance the speed and security of these technologies, but further research and development are needed before they can be fully utilized.