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- Title
Ising Ladder with Four-Spin Plaquette Interaction in a Transverse Magnetic Field.
- Authors
Nunes, Maria Eugenia S.; Lima, Francisco Welington S.; Plascak, Joao A.
- Abstract
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.
- Subjects
QUANTUM phase transitions; MAGNETIC fields; ISING model; QUANTUM spin models
- Publication
Entropy, 2023, Vol 25, Issue 12, p1665
- ISSN
1099-4300
- Publication type
Article
- DOI
10.3390/e25121665