Order parameters with higher dimensionful composite fields
نویسندگان
چکیده
We discuss the possibility of the spontaneous symmetry breaking characterized by order parameters with higher dimensionful composite fields. By analyzing general Ginzburg-Landau potential for a complex scalar field φ = φ1 +iφ2 with O(2) symmetry, we demonstrate that a phase characterized by 〈φ21 − φ 2 2〉 6 = 0 with 〈φ1〉 = 〈φ2〉 = 0 is realized in a certain parameter region. To clarify the driving force to favor this phase, we study the O(2) φ theory in three dimensions.
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