Dangerously irrelevant operator: Difference between revisions

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In [[statistical mechanics]] and [[quantum field theory]], a '''dangerously irrelevant operator''' operator (or '''dangerous irrelevant operator''' operator) is an [[operator]] which is irrelevant, but yet affects the [[infrared]] physics significantly because the [[vacuum expectation value]] of some field depends sensitively upon the dangerously irrelevant operator.
 
== Example ==