JAX-ReaxFF

**JAX-ReaxFF** is a gradient-based framework for ReaxFF parameter optimization using JAX. It reduces optimization time from days to minutes by computing exact gradients of the loss function, running efficiently on CPUs, GPUs, and TPUs.

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Overview

**JAX-ReaxFF** is a gradient-based framework for ReaxFF parameter optimization using JAX. It reduces optimization time from days to minutes by computing exact gradients of the loss function, running efficiently on CPUs, GPUs, and TPUs.

Reference Papers

Reference papers are not yet linked for this code.

Full Documentation

Official Resources

  • Source Repository: https://github.com/cagrikymk/JAX-ReaxFF
  • License: Open source

Overview

JAX-ReaxFF is a gradient-based framework for ReaxFF parameter optimization using JAX. It reduces optimization time from days to minutes by computing exact gradients of the loss function, running efficiently on CPUs, GPUs, and TPUs.

Scientific domain: Differentiable ReaxFF parameter optimization with JAX
Target user community: Researchers optimizing ReaxFF parameters for reactive MD

Theoretical Methods

  • Differentiable ReaxFF via JAX
  • Automatic differentiation
  • Gradient-based optimization
  • Multi-device support (CPU/GPU/TPU)
  • LAMMPS ReaxFF format compatibility

Capabilities (CRITICAL)

  • Exact gradient computation
  • Multi-device optimization (CPU/GPU/TPU)
  • LAMMPS ReaxFF format output
  • Minutes-scale optimization
  • Multiple loss functions

Sources: GitHub repository

Key Strengths

Speed:

  • Days to minutes optimization
  • Exact gradients (no finite differences)
  • GPU/TPU acceleration
  • Efficient convergence

Compatibility:

  • LAMMPS ReaxFF format
  • Standard force field files
  • Drop-in replacement for optimization
  • Existing parameter improvement

Inputs & Outputs

  • Input formats: ReaxFF parameter files, training data
  • Output data types: Optimized ReaxFF parameters (LAMMPS format)

Interfaces & Ecosystem

  • JAX: Differentiation framework
  • LAMMPS: MD engine
  • Python: Core

Performance Characteristics

  • Speed: Minutes (vs days traditional)
  • Accuracy: Training data dependent
  • System size: Any (force field)
  • Automation: Full

Computational Cost

  • Optimization: Minutes
  • MD: Standard ReaxFF speed

Limitations & Known Constraints

  • ReaxFF only: No other force fields
  • JAX dependency: Required
  • Training data quality: Critical
  • Local minima: Gradient-based may get stuck

Comparison with Other Codes

  • vs traditional ReaxFF fitting: JAX-ReaxFF is 1000x faster
  • vs I-ReaxFF: JAX-ReaxFF is optimization, I-ReaxFF is differentiable MD
  • Unique strength: Gradient-based ReaxFF optimization reducing days to minutes with JAX

Application Areas

ReaxFF Development:

  • Rapid parameter optimization
  • Force field refinement
  • Multi-objective fitting
  • New chemistry parameterization

Reactive MD:

  • LAMMPS production MD
  • Combustion, catalysis
  • Battery electrolytes
  • Polymer degradation

Best Practices

  • Use diverse training data
  • Start from reasonable initial parameters
  • Monitor loss convergence
  • Validate with MD benchmarks

Community and Support

  • Open source
  • GitHub repository
  • Academic development

Verification & Sources

Primary sources:

  1. GitHub: https://github.com/cagrikymk/JAX-ReaxFF

Confidence: VERIFIED

Verification status: ✅ VERIFIED

  • Source code: ACCESSIBLE (GitHub)
  • Specialized strength: Gradient-based ReaxFF optimization reducing days to minutes with JAX

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