Topological order is a type of quantum order that characterizes the global properties of a many-body system, distinguishing it from conventional symmetry-breaking orders. In systems exhibiting topological order, the ground state of the system is degenerate and robust against local perturbations, which is crucial for understanding phenomena like fractionalization and anyonic statistics. This concept is particularly significant when considering symmetry operations and the unique electronic states found in topological insulators.
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