Struct RgFlow 

pub struct RgFlow {
    pub beta: BetaFunction,
    pub gamma0: f64,
    pub eta0: f64,
}

Callan-Symanzik RG flow for coupling and mass.

Implements μ dg/dμ = β(g), μ dm/dμ = −γ_m(g) m, where γ_m is the mass anomalous dimension.

Fields

beta: BetaFunction

Beta function governing the coupling flow.

gamma0: f64

One-loop mass anomalous dimension coefficient γ₀ (γ_m = γ₀ g²).

eta0: f64

Field anomalous dimension coefficient η₀ (η = η₀ g²).

Implementations

impl RgFlow

pub fn new(beta: BetaFunction, gamma0: f64, eta0: f64) -> Self

Construct a new RG flow with given beta function and anomalous dimension coefficients.

pub fn gamma_mass(&self, g: f64) -> f64

Anomalous dimension of the mass at coupling g: γ_m(g) = γ₀ g².

pub fn eta(&self, g: f64) -> f64

Field anomalous dimension η(g) = η₀ g².

pub fn integrate(&self, g0: f64, m0: f64, t_max: f64, n: usize) -> RgFlowResult

Integrate the full RG flow from t=0 to t=t_max with n steps.

Returns a RgFlowResult containing the full trajectory.

pub fn nu_exponent(&self) -> Option<f64>

Correlation length exponent ν from the eigenvalue of the linearized beta function at the fixed point: ν = −1/ω.

Trait Implementations

impl Clone for RgFlow

fn clone(&self) -> RgFlow

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RgFlow

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.