# Quantum phase transition in a non-Hermitian XY spin chain with global complex transverse field

@article{Liu2021QuantumPT, title={Quantum phase transition in a non-Hermitian XY spin chain with global complex transverse field}, author={Yu-Guo Liu and Lu Xu and Zhi Li}, journal={Journal of Physics: Condensed Matter}, year={2021}, volume={33} }

In this work, we investigate the quantum phase transition in a non-Hermitian XY spin chain. The phase diagram shows that the critical points of Ising phase transition expand into a critical transition zone after introducing a non-Hermitian effect. By analyzing the non-Hermitian gap and long-range correlation function, one can distinguish different phases by means of different gap features and decay properties of correlation function, a tricky problem in traditional XY model. Furthermore, the… Expand

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