Light speed and uncertanty principle

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Traveling at the speed of light is impossible, and the concept of time standing still does not exist within the framework of physics. The uncertainty principle cannot be violated because it relies on fundamental aspects of quantum mechanics that are unaffected by hypothetical scenarios involving light speed. There is no basis for suggesting that quantum field theory (QFT) establishes a lower maximum speed for matter compared to relativity. The discussion highlights that such questions are speculative and not grounded in scientific reality. Ultimately, the principles of physics do not support the premise that light speed travel would lead to violations of established laws.
brianhurren
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Is it true that if time stood still it would violate the uncertainty principle. therefor if you traveled at the speed of light time stands still and you would violate the uncertainty principle. if this is true does that sugest that QFT sets a lower max speed that matter can travel at than what relativity does. or would it mean that there are different max speeds for different stuff.
 
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None of that is true because:

1. You can't travel at light speed.
2. Time can't "stand still".
 
The short answer is "no".

The longer answer is that there is no such thing as time standing still or you traveling at the speed of light, and therefore no way that physics can give you an answer to your question. It's like asking what the natural prey of elephants would be if elephants were carnivorous - you have to ask a science fiction writer not a biologist.
 

Thread 'Two equivalent statements of time reversal symmetric Hamiltonian'

Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?
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