Order operator

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 transitions. There exists a dual version of it, the disorder operator or , whose expectation value characterizes a phase transition by indicating the prolific presence of defect or vortex lines in an ordered phase.

Order operator

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 transitions. There exists a dual version of it, the disorder operator or , whose expectation value characterizes a phase transition by indicating the prolific presence of defect or vortex lines in an ordered phase.