Physical Review E
We study the ground-state properties of a spin-1/2 model on a chain containing four-spin Ising-like interactions in the presence of both transverse and longitudinal magnetic fields. We use entanglement entropy and finite-size scaling methods to obtain the phase diagrams of the model. Our numerical calculations reveal a rich variety of phases and the existence of multicritical points in the system. We identify phases with both ferromagnetic and antiferromagnetic orderings. We also find periodically modulated orderings formed by a cluster of like spins followed by another cluster of opposite like spins. The quantum phases in the model are found to be separated by either first- or second-order transition lines.
Magnetic fields; Quantum physics; Transverses
Citation: Pilot Scholars Version (Modified MLA Style)
Boechat, B.; Florencio, J.; Saguia, A.; and Bonfim, O. F. de Alcantara, "Critical behavior of a quantum chain with four-spin interactions in the presence of longitudinal and transverse magnetic fields" (2014). Physics Faculty Publications and Presentations. Paper 51.