Order operator: Difference between revisions

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In [[quantum field theory]], an '''order operator''' or an '''order field''' is a [[quantum field]] version of Landau's [[order parameter]] whose expectation value characterizes [[phase transition]]s. There exists a dual version of it, the [[disorder field|disorder operator]] or [[disorder field]], whose expectation value characterizes a phase transition by indicating the prolific presence of defect or vortex lines in an ordered phase.
 
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