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advanced_tools:gauge_symmetry

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advanced_tools:gauge_symmetry [2018/12/19 11:01]
jakobadmin ↷ Links adapted because of a move operation
advanced_tools:gauge_symmetry [2020/04/02 20:12] (current)
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 When we describe things in physics, we have always some freedom in our description. For example, it doesn'​t matter what coordinate system we choose. It makes no difference where we choose the origin of the coordinate system or how it is oriented. ​ When we describe things in physics, we have always some freedom in our description. For example, it doesn'​t matter what coordinate system we choose. It makes no difference where we choose the origin of the coordinate system or how it is oriented. ​
  
-The computations can be different in different coordinate systems and usually, one picks a coordinate system where the computation is especially simple. However, the physics that we are describing, of course, doesn'​t care about how we describe it. It stays the same, now matter how we choose our coordinate system. ​+The computations can be different in different coordinate systems and usually, one picks a coordinate system where the computation is especially simple. However, the physics that we are describing, of course, doesn'​t care about how we describe it. It stays the same, no matter how we choose our coordinate system. ​
  
 In modern physics, we no longer describe what is happening merely through the position of objects at a given time, as we do it in classical mechanics. Instead, we use abstract objects called fields. The best theory of what is happening in nature at the most fundamental level is [[theories:​quantum_field_theory:​canonical|quantum field theory]]. Like the electromagnetic field, these fields can get excited (think: we can produce a wave or ripple of the field). For example, when we excite the electron field we "​produce"​ an electron. ​ In modern physics, we no longer describe what is happening merely through the position of objects at a given time, as we do it in classical mechanics. Instead, we use abstract objects called fields. The best theory of what is happening in nature at the most fundamental level is [[theories:​quantum_field_theory:​canonical|quantum field theory]]. Like the electromagnetic field, these fields can get excited (think: we can produce a wave or ripple of the field). For example, when we excite the electron field we "​produce"​ an electron. ​
advanced_tools/gauge_symmetry.txt · Last modified: 2020/04/02 20:12 by 95.90.205.199