Nunes, M.E.S.; Lima, F.W.S.; Plascak, J.A. Ising Ladder with Four-Spin Plaquette Interaction in a Transverse Magnetic Field. Entropy2023, 25, 1665.
Nunes, M.E.S.; Lima, F.W.S.; Plascak, J.A. Ising Ladder with Four-Spin Plaquette Interaction in a Transverse Magnetic Field. Entropy 2023, 25, 1665.
Nunes, M.E.S.; Lima, F.W.S.; Plascak, J.A. Ising Ladder with Four-Spin Plaquette Interaction in a Transverse Magnetic Field. Entropy2023, 25, 1665.
Nunes, M.E.S.; Lima, F.W.S.; Plascak, J.A. Ising Ladder with Four-Spin Plaquette Interaction in a Transverse Magnetic Field. Entropy 2023, 25, 1665.
Abstract
The spin-1/2 quantum transverse Ising model, defined on a ladder structure, with nearest-neighbor and four-spin interaction on a plaquette, is studied by using exact diagonalization and finite-size-scaling procedures. The quantum phase transition between the ferromagnetic and paramagnetic phases has been obtained in 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.
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