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danb
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- TL;DR Summary
- The vacuum MUST have its own reference frame in order for the frame-invariant time dilation in the twin paradox to have a physical cause.
The point of the twin paradox in special relativity is that the traveling twin experiences a real, frame-invariant effect in which the time evolution of all moving matter is slowed down. If you read a hundred articles and textbooks on SR, you'll see a hundred variations on the message that the symmetry of the paradox is broken by the fact that the traveler passes through two or more reference frames, either by accelerating or by having two moving observers who synchronize clocks when they pass each other.
However, the number of articles that explain what physical mechanism causes the time dilation is exactly zero. Even worse, the relativistic principle that there's no preferred reference frame explicitly rules out absolute motion through the vacuum as part of the mechanism. My question is this: How can that principle possibly be true? It's literally inconsistent with physical determinism.
The causal ordering of events in the traveler's voyage can be summarized as follows:
It's inconceivable that motion relative to Earth could be part of any causal mechanism. That would be like saying you can make your car accelerate by moving your foot through the air relative to the gas pedal. It would imply action at a distance with one random object out of all the objects in the spaceship's vicinity, which which it has an equal number of other relative velocities.
So what's left? There's only one aspect of the traveler's motion that can initiate a physical mechanism to slow down the traveler's time evolution: its absolute velocity through the vacuum. The vacuum MUST have its own reference frame. If it doesn't, there's no information available to determine what the rate of time dilation should be. What other explanation can there be?
However, the number of articles that explain what physical mechanism causes the time dilation is exactly zero. Even worse, the relativistic principle that there's no preferred reference frame explicitly rules out absolute motion through the vacuum as part of the mechanism. My question is this: How can that principle possibly be true? It's literally inconsistent with physical determinism.
The causal ordering of events in the traveler's voyage can be summarized as follows:
- The traveler moves.
- Some unknown quantum effect occurs.
- The traveler's time evolution is slowed down.
It's inconceivable that motion relative to Earth could be part of any causal mechanism. That would be like saying you can make your car accelerate by moving your foot through the air relative to the gas pedal. It would imply action at a distance with one random object out of all the objects in the spaceship's vicinity, which which it has an equal number of other relative velocities.
So what's left? There's only one aspect of the traveler's motion that can initiate a physical mechanism to slow down the traveler's time evolution: its absolute velocity through the vacuum. The vacuum MUST have its own reference frame. If it doesn't, there's no information available to determine what the rate of time dilation should be. What other explanation can there be?
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