ButterflyQuant: Ultra-low-bit LLM Quantization through Learnable Orthogonal Butterfly Transforms

@misc{xu2025butterflyquantultralowbitllm,
      title={ButterflyQuant: Ultra-low-bit LLM Quantization through Learnable Orthogonal Butterfly Transforms},
      author={Bingxin Xu and Zhen Dong and Oussama Elachqar and Yuzhang Shang},
      year={2025},
      eprint={2509.09679},
      archivePrefix={arXiv},
      primaryClass={cs.LG},
      url={https://arxiv.org/abs/2509.09679},
}