Ising ladder with four-spin plaquette interaction in a transverse magnetic field.
The spin-1/2 quantum transverse Ising model, defined on a ladder structure, with nearest neighbor and four-spin interaction on a plaquette, was studied by using exact diagonalization on finite ladders together with finite-size-scaling procedures. The quantum phase transition between the ferromagneti...
| Autores: | , , |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | Brasil |
| Recursos: | Universidade Federal de Ouro Preto (UFOP) |
| Repositorio: | Repositório Institucional da UFOP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.ufop.br:123456789/19386 |
| Acesso em linha: | https://www.repositorio.ufop.br/handle/123456789/19386 https://doi.org/10.3390/e25121665 |
| Access Level: | acceso abierto |
| Palavra-chave: | Quantum spin models Phase diagram Exact diagonalization Ladder structure |
| Resumo: | The spin-1/2 quantum transverse Ising model, defined on a ladder structure, with nearest neighbor and four-spin interaction on a plaquette, was studied by using exact diagonalization on finite ladders together with finite-size-scaling procedures. The quantum phase transition between the ferromagnetic and paramagnetic phases has then been obtained by extrapolating the data to the thermodynamic limit. The critical transverse field decreases as the antiferromagnetic four-spin interaction increases and reaches a multicritical point. However, the exact diagonalization approach was not able to capture the essence of the dimer phase beyond the multicritical transition. |
|---|