Hidden quantum correlations in the ground states of quasiclassical spin systems
arXiv:2411.08394 · doi:10.1103/PhysRevB.111.174441
Abstract
Frustrated spin models may lead to the formation of both classical non-collinear spin structures and unique quantum phases including highly entangled quantum spin liquids. Here, we study the entanglement and spatial quantum correlations in linear spin-wave theory around a classical spin-spiral ground state. We find that the entanglement between pairs of sites is short-ranged, and is completely absent in certain cases. In contrast, the entanglement hidden in multi-site clusters is peaked close to phase transitions and shows an asymptotic behavior modulated by the period of the magnetic structure. These findings motivate further exploring the connection in the entanglement properties of fully quantum and of quasiclassical spin models.
12 pages, 5 figures
References in corpus (11)
- Entanglement in continuous variable systems: Recent advances and current perspectives
- Quantum magnonics: when magnon spintronics meets quantum information science
- Spin liquid phase of the Heisenberg model on the triangular lattice
- Skyrmion Qubits: A New Class of Quantum Logic Elements Based on Nanoscale Magnetization
- Measurement-based quantum computer in the gapped ground state of a two-body Hamiltonian
- Entanglement Entropy of the Two-Dimensional Heisenberg Antiferromagnet
- Controlled Creation of Quantum Skyrmions
- Quantum Skyrmion Lattices in Heisenberg Ferromagnets
- Resolving nonclassical magnon composition of a magnetic ground state via a qubit
- Quantum Sensing of Antiferromagnetic Magnon Two-Mode Squeezed Vacuum
- Spin-wave study of entanglement and Rényi entropy for coplanar and collinear magnetic orders in two-dimensional quantum Heisenberg antiferromagnets