Struct FourierOptions 

pub struct FourierOptions {
    pub sign: f64,
    pub maxbonddim: usize,
    pub tolerance: f64,
    pub k: usize,
    pub normalize: bool,
}

Options for Fourier transform construction.

Controls the sign convention, compression parameters, and normalization of the quantics Fourier transform MPO.

Examples

use tensor4all_quanticstransform::FourierOptions;

// Forward transform (default): sign = -1
let fwd = FourierOptions::forward();
assert_eq!(fwd.sign, -1.0);
assert!(fwd.normalize);

// Inverse transform: sign = +1
let inv = FourierOptions::inverse();
assert_eq!(inv.sign, 1.0);

// Custom options
let opts = FourierOptions {
    maxbonddim: 20,
    tolerance: 1e-12,
    ..FourierOptions::forward()
};
assert_eq!(opts.maxbonddim, 20);

Fields

sign: f64

Sign in the exponent: -1.0 (forward) or 1.0 (inverse)

maxbonddim: usize

Maximum bond dimension after compression

tolerance: f64

Tolerance for compression

k: usize

Number of Chebyshev basis functions (K+1 points)

normalize: bool

Whether to normalize as an isometry

Implementations

impl FourierOptions

pub fn forward() -> Self

Create options for forward Fourier transform.

pub fn inverse() -> Self

Create options for inverse Fourier transform.

Trait Implementations

impl Clone for FourierOptions

fn clone(&self) -> FourierOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FourierOptions

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

Formats the value using the given formatter.

impl Default for FourierOptions

fn default() -> Self

Returns the “default value” for a type.