### Abstract

The number of so-called invisible states which need to be added to the q-state Potts model to transmute its phase transition from continuous to first order has attracted recent attention. In the q = 2 case, a Bragg–Williams (mean-field) approach necessitates four such invisible states while a 3-regular random graph formalism requires seventeen. In both of these cases, the changeover from second- to first-order behaviour induced by the invisible states is identified through the tricritical point of an equivalent Blume–Emery–Griffiths model. Here we investigate the generalized Potts model on a Bethe lattice with z neighbours. We show that, in the q = 2 case, [equation - see note] invisible states are required to manifest the equivalent Blume–Emery–Griffiths tricriticality. When z = 3, the 3-regular random graph result is recovered, while z → ∞ delivers the Bragg–Williams (mean-field) result. The equation in this abstract does not display correctly on this platform, please see http://dx.doi.org/10.1088/1751-8113/46/38/385002 for the full abstract.

Original language | English |
---|---|

Article number | 385002 |

Journal | Journal of Physics A: Mathematical and Theoretical |

Volume | 46 |

Issue number | 38 |

DOIs | |

Publication status | Published - 2013 |

### Bibliographical note

The full text is available free from the link given. The published version can be found at http://dx.doi.org/10.1088/1751-8113/46/38/385002.### Keywords

- lattice systems
- Potts
- Bethe lattices

## Fingerprint Dive into the research topics of 'Potts models with invisible states on general Bethe lattices'. Together they form a unique fingerprint.

## Cite this

Ananikian, N., Izmailyan, N., Johnston, D. A., Kenna, R., & Ranasinghe, R. P. K. C. M. (2013). Potts models with invisible states on general Bethe lattices.

*Journal of Physics A: Mathematical and Theoretical*,*46*(38), [385002]. https://doi.org/10.1088/1751-8113/46/38/385002