## 摘要

We present detailed analytic calculations of finite-volume energy spectra, mean-field theory, as well as a systematic low-energy effective field theory for the square lattice quantum dimer model. An emergent approximate spontaneously broken SO(2) symmetry gives rise to a pseudo-Goldstone boson. Remarkably, this soft phononlike excitation, which is massless at the Rokhsar-Kivelson (RK) point, exists far beyond this point. The Goldstone physics is captured by a systematic low-energy effective field theory. We determine its low-energy parameters by matching the analytic effective field theory with exact diagonalization results. This confirms that the model exists in the columnar (and not in a plaquette or mixed) phase all the way to the RK point.

原文 | 英語 |
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文章編號 | 115120 |

期刊 | Physical Review B |

卷 | 94 |

發行號 | 11 |

DOIs | |

出版狀態 | 已發佈 - 2016 9月 8 |

## ASJC Scopus subject areas

- 電子、光磁材料
- 凝聚態物理學