- #1
fluidistic
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It is known that Maxwell equations have the time reversal symmetry. I.e. by changing t by -t, J by -J (which can be understood as the charges going in the opposite direction when time is reversed, which makes sense), E to E and B to -B, the equations are still satisfied.
However, it is also claimed in several places (condensed matter when dealing with ferromagnetism or topological insulators when dealing with magnetic materials, just to name a few.) that magnetism breaks the time reversal symmetry.
How is that even possible? Wouldn't that imply that Maxwell equations lack the T-symmetry? If not, what's going on?
However, it is also claimed in several places (condensed matter when dealing with ferromagnetism or topological insulators when dealing with magnetic materials, just to name a few.) that magnetism breaks the time reversal symmetry.
How is that even possible? Wouldn't that imply that Maxwell equations lack the T-symmetry? If not, what's going on?