Recent comments in /f/askscience

SignificantYou3240 t1_jdugit2 wrote

This is not really the case with me. When I sleep on my arm, I can pick it up with my other arm and it’s hella heavy. I used to drop it onto my face because it was crazy how it would land so forking hard.

But motor function came back before the tingly feeling left. I suspect that the tingly feeling, while it feels crazy, it’s not all your neurons, if it were it would hurt a lot more, like having the limb shredded or something. So maybe your neurons are at 80% but it feels like zero

1

Fenrisvitnir t1_jduev91 wrote

>How many entangled particle groups can function independently of each other while still grouped.

Not sure what you mean here - you can in theory cross-entangle entangled groups of particles, but I doubt that is what you are really asking.

2

Fenrisvitnir t1_jduel01 wrote

>Where two particles interact regardless of the physical distance between them.

Technically this is wrong - the two particles are pair-linked by state no matter the distance between them. They don't send information back and forth. We don't know the mechanism for preserving the entanglement.

>Entanglement has also been described as a measurement of one particle that decides the properties of another because the interaction between them determines their shared properties that must be conserved.

This is closer because at the most fundamental level is when two particles are entangled, the shared state constraints between them are preserved until measurement of either or both (and possibly after). But the measurement simultaneously collapses the state of both particles, potentially even when done to the original system state before the particles left it. However, again, we don't know the underlying mechanism (is it non-local binding? pilot waves? collapse of probabilities?).

The wrong way to think about entanglement is a pair of particles that send info back and forth between them to make sure everything checks out - they share state, they don't exchange it. This is why parallel worlds, pilot waves, etc. are theories about how the state is shared are more accurate because they attempt to preserve the state constraints globally. Nothing about entanglement moves faster than the speed of light.

And to answer your question, yes, entanglement does appear to be transitive to other particles under the right conditions, so you can chain state constraints.

This assumes that entanglement is correctly understood by experiment today, which is still not entirely clear, even though the physics community has settled on Copenhagen for the most part.

9

TheEastStudentCenter t1_jdudvkj wrote

When a body part is compressed, the pressure on the sensory nerves that carry information about touch, temperature, and pain can cause temporary disruption of their function. This disruption can lead to paresthesia, which is an abnormal sensation like tingling, numbness, or burning. In more severe cases, the compression can cause anesthesia, which is a complete loss of sensation in the affected area.

On the other hand, motor neurons that control voluntary movement are less affected by compression because they are less sensitive to pressure. These neurons are located deeper in the body and are more protected by other tissues like muscle and bone. Additionally, motor neurons do not rely on sensory information to generate movement. Instead, they receive signals from the brain and spinal cord that instruct them to contract or relax muscles.

Therefore, even if the sensory neurons are temporarily affected by compression, the motor neurons can still receive signals from the brain and spinal cord and initiate voluntary movements. However, if the compression is severe or prolonged, it can eventually affect the motor neurons as well, leading to paralysis or weakness.

17

DragonZnork t1_jdud88p wrote

Yes, you can entangle more than two particles or qubits, it has been done many times already. However, it becomes increasingly difficult with higher numbers of objects. Entangling particles or qubits "by hand" up to macroscopic scales is unlikely, at least for now because it's a huge number of things.

On the other hand, superconductivity is an entangled state in some sense, and definitely reaches macroscopic scales.

3