Yang-Mills Theory
In the last half of the twentieth century, physicists succeeded in unifying three of the four fundamental forces of nature: electromagnetism, the "weak force" responsible for radioac...
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Gauge Symmetry
If a field theory possesses a gauge symmetry, then the theory is invariant under certain local transformations of the fields. The description of the system has a built-in redundancy cor...
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Gauge Theory
Gauge theory is concerned with the problem of comparing physical states at different space-time locations. To get a feel for the problem, it is best to begin with a simple example. Quantu...
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Yang-Mills Theory
Gauge Symmetry
Gauge Theory