Spontaneous symmetry breaking occurs even when laws retain symmetry
Spontaneous symmetry breaking
Spontaneous symmetry breaking occurs even when laws retain symmetry
Spontaneous symmetry breaking (SSB) describes a situation where a system initially in a symmetric state transitions to an asymmetric state. This phenomenon occurs despite the underlying laws, such as the equations of motion or Lagrangian, maintaining symmetry. The lowest-energy vacuum solutions, however, do not exhibit the same symmetry.
Example
Consider a perfectly symmetrical crystal lattice. If the crystal undergoes spontaneous symmetry breaking, it will rearrange into a less symmetrical structure, like a distorted crystal, even though the physical laws governing crystal formation remain unchanged.
Remember this
Understanding SSB is crucial for fields like particle physics and condensed matter physics, as it explains phenomena like the Higgs mechanism and the formation of crystal structures.
Text adapted from Wikipedia, licensed under CC BY-SA 4.0.
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