Spontaneous breaking of U(1) symmetry at zero temperature in one dimension

@misc{lee2023spontaneousbreakingu1,
      title={Spontaneous breaking of U(1) symmetry at zero temperature in one dimension}, 
      author={Jong Yeon Lee and Hosho Katsura and Haruki Watanabe},
      year={2023},
      eprint={2310.16881},
      archivePrefix={arXiv},
      primaryClass={cond-mat.stat-mech},
      url={https://arxiv.org/abs/2310.16881}, 
}