Derivative expansion for computing critical exponents of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">O</mml:mi><mml:mo>(</mml:mo><mml:mi>N</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math> symmetric models at next-to-next-to-leading order
نویسندگان
چکیده
We apply the derivative expansion of effective action in exact renormalization group equation up to fourth order $Z_2$ and $O(N)$ symmetric scalar models $d=3$ Euclidean dimensions. compute critical exponents $\nu$, $\eta$ $\omega$ using polynomial field. obtain our predictions for employing two regulators widely used ERG computations. Wynn's epsilon algorithm improve exponents, extrapolating beyond next-to-next-to-leading prediction expansion.
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physreve.103.032135