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arXiv:2604.17700 · Physical review. B./Physical review. B

Dynamical spin-nematic correlation in a transverse field Ising chain with non-Hermitian Gamma interaction

Yu-Hong Yan, Ran Wang, Kun-Liang Zhang

cond-mat.mes-hallquant-phSubmitted Apr 20, 2026• Announced Apr 21, 2026• 0 citations• Revised Oct 1, 2026 (v3)
v1 · Apr 20, 2026v2 · Jul 9, 2026v3 · Oct 1, 2026
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Abstract

We investigate the effect of non-Hermitian Gamma interaction on the phase transitions and magnetic correlations for the transverse field Ising chain. We demonstrate that apart from the gapped antiferromagnetic and paramagnetic phases, there is a gapless phase induced by parity-time symmetry breaking, where the system exhibits long-range and short-range spin-nematic correlations in different regions divided by the quantum critical line determined from the correlation function and the subsystem entanglement entropy. Furthermore, we reveal that the parity-time symmetry breaking leads to the emergence of dynamical spin-nematic correlation, which also suggests a way of characterizing the spin-nematic map through non-equilibrium dynamics. Our findings show rich quantum phases stem from the competition among the Ising interaction, transverse field and non-Hermitian Gamma interaction, as well as providing a scheme for generating spin-nematic correlation in the spin chain.

Journal reference
Phys. Rev. B 114, 214304 (2026)
DOI
10.1103/tshd-jsf4
Comments
13 pages, 8 figures

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