TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.8.3.050
TI  - Ground state analysis of the spin-1/2 XX chain model with anisotropic three-spin interaction
PY  - 2025/08/11
UR  - https://www.scipost.org/SciPostPhysCore.8.3.050
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 8
IS  - 3
SP  - 050
A1  - Mahboob, Nima
AU  - Mahdavifar, Saeed
AU  - Khastehdel Fumani, Fatemeh
AB  - In this paper, we investigate the ground state properties of the spin-1/2 XX chain model with anisotropic three-spin interaction using the fermionization technique. By exactly diagonalizing the Hamiltonian, we analyze the dispersion relation, ground state energy, and order parameters. Our findings identify two gapless phases, distinguished by a Lifshitz transition line: one exhibiting long-range chiral correlations and the other characterized by chiral-nematic correlations. These correlations do not correspond to conventional symmetry-breaking local order parameters typically associated with gapped one-dimensional phases but instead signify emergent quantum coherence in the gapless regime. Further, we study the ground state phase diagram through the concurrence and quantum discord between nearest-neighbor spins, finding that these measures are maximized at the critical line, with an additional entangled region observed. Finally, we examine the spin squeezing parameter and entanglement entropy, demonstrating that the ground state is squeezed throughout and becomes extremely squeezed at the critical line. Notably, in the gapless chiral-nematic phase, the Heisenberg limit is achieved. By dividing the system into two equal parts, we observe significant entanglement in the gapless chiral phase. The central charge calculation confirms the critical nature of the gapless chiral-nematic phase, while the entanglement entropy follows volume-law scaling in the gapless chiral phase.
ER  -

@Article{10.21468/SciPostPhysCore.8.3.050,
	title={{Ground state analysis of the spin-1/2 XX chain model with anisotropic three-spin interaction}},
	author={Nima Mahboob and Saeed Mahdavifar and Fatemeh Khastehdel Fumani},
	journal={SciPost Phys. Core},
	volume={8},
	pages={050},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.8.3.050},
	url={https://scipost.org/10.21468/SciPostPhysCore.8.3.050},
}