quanticsgrids

Grid structures for efficient conversion between quantics representation, grid indices, and original coordinates. This is a Rust port of QuanticsGrids.jl.

Documentation

• User guide: https://tensor4all.github.io/quanticsgrids-rs/

Features

• InherentDiscreteGrid: Low-level grid for integer coordinates
• DiscretizedGrid: High-level grid for continuous domains
• UnfoldingScheme: Fused (default) or Interleaved index ordering
• Efficient O(R * D) coordinate conversions

Usage

use quanticsgrids::{DiscretizedGrid, UnfoldingScheme};

// Create a 2D grid with 3 bits for x and 2 bits for y
let grid = DiscretizedGrid::builder(&[3, 2])
    .with_lower_bound(&[0.0, 0.0])
    .with_upper_bound(&[1.0, 2.0])
    .build()?;

// Convert coordinates to quantics indices
let quantics = grid.origcoord_to_quantics(&[0.5, 1.0])?;

// Convert back to coordinates
let coords = grid.quantics_to_origcoord(&quantics)?;

// Get local dimensions for TCI
let local_dims = grid.local_dimensions();

Coordinate Conversions

From	To	Method
Original coordinates	Quantics indices	origcoord_to_quantics()
Quantics indices	Original coordinates	quantics_to_origcoord()
Grid indices	Quantics indices	grididx_to_quantics()
Quantics indices	Grid indices	quantics_to_grididx()

License

Licensed under either of the following, at your option:

• Apache License, Version 2.0
• MIT license