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  • Letter
  • Open Access

Fracton topological order at finite temperature

Xiaoyang Shen1,*, Zhengzhi Wu1,*, Linhao Li2,*, Zhehan Qin1, and Hong Yao1,†

  • 1Institute for Advanced Study, Tsinghua University, Beijing 100084, China
  • 2Institute for Solid State Physics, The University of Tokyo. Kashiwa, Chiba 277-8581, Japan

  • *These authors contributed equally to the work.
  • †yaohong@tsinghua.edu.cn
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Phys. Rev. Research 4, L032008 – Published 13 July, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.L032008

Abstract

As new kinds of stabilizer code models, fracton models have been promising in realizing quantum memory or quantum hard drives. However, it has been shown that the fracton topological order of 3D fracton models occurs only at zero temperature. In this Letter, we show that higher dimensional fracton models can support a fracton topological order below a nonzero critical temperature Tc. Focusing on a typical four-dimensional (4D) X-cube model, we show that there is a finite critical temperature Tc by analyzing its free energy from duality. We also obtained the expectation value of the 't Hooft loops in the 4D X-cube model, which directly shows a confinement-deconfinement phase transition at finite temperature. This finite-temperature phase transition can be understood as spontaneously breaking the Z2 one-form subsystem symmetry. Moreover, we propose an alternative no-go theorem for finite-temperature quantum fracton topological order.

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Phys. Rev. Research 4, L032008– Published 13 July, 2022
  • Received 19 November 2021
  • Revised 7 June 2022
  • Accepted 9 June 2022
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