Ground state properties of the frustrated spin-1/2 XY model

Quantum simulation of many-body systems stands at the forefront of contemporary physics, with the frustrated XY model being particularly relevant to experimental platforms based on cold atoms. Nevertheless, the ground-state properties of this model remain elusive. In this work, we apply state-of-the-art numerical techniques, including the density matrix renormalization group and the finite projected entangled pair state method, to systematically explore the ground-state behavior of the highly frustrated XY model. Our results provide evidence for exotic quantum phenomena such as the deconfined quantum criticality. These findings not only advance the understanding of novel quantum behavior in frustrated spin systems, but also offer valuable theoretical guidance for quantum simulation experiments.