Field-induced magnon decays in dipolar quantum magnets
arXiv:2407.19011 · doi:10.1103/2tx1-v7ml
Abstract
We investigate the spontaneous disintegration of magnons in two-dimensional ferromagnets and antiferromagnets dominated by long-range dipolar interactions. Analyzing kinematic constraints, we show that the unusual dispersion of dipolar ferromagnets in a uniform magnetic field precludes magnon-decay at all fields, in sharp contrast to short-range exchange-driven magnets. However, in a staggered magnetic field, magnons can decay in both dipolar ferromagnets and antiferromagnets. Remarkably, such decays do not require a minimum threshold field, and happen over a nearly fixed fraction of the Brillouin Zone in the XY limit, highlighting the significant role played by dipolar interactions. In addition, topological transitions in the decay surfaces lead to singularities in the magnon spectrum. Regularizing such singular behavior via a self-consistent approach, we make predictions for dynamical spin correlations accessible to near-term quantum simulators and sensors.
5+6 pages, 4+2 figures; (v2) 5+9 pages, 4+4 figures; (v3) 5+12 pages, 4+6 figures
References in corpus (34)
- Many-Body Physics with Individually-Controlled Rydberg Atoms
- Observation of entanglement propagation in a quantum many-body system
- Non-local propagation of correlations in long-range interacting quantum systems
- Long-range interacting quantum systems
- Spontaneous Magnon Decays
- Breakdown of Magnons in a Strongly Spin-Orbital Coupled Magnet
- Spin-waves in triangular lattice antiferromagnet: decays, spectrum renormalization, and singularities
- Critical fermi surfaces and non-fermi liquid metals
- Continuous Symmetry Breaking in a Two-dimensional Rydberg Array
- Recent Developments in Non-Fermi Liquid Theory
- Anomalous Behavior of Spin Systems with Dipolar Interactions
- Probing site-resolved correlations in a spin system of ultracold molecules
- Magnon Decay in Noncollinear Quantum Antiferromagnets
- Strongly interacting ultracold polar molecules
- Instability of antiferromagnetic magnons in strong fields
- Quantum-impurity relaxometry of magnetization dynamics
- Entanglement and fluctuations in the XXZ model with power-law interactions
- Diagnosing phases of magnetic insulators via noise magnetometry with spin qubits
- Universal spin wavepacket transport in van der Waals antiferromagnets
- Quadrupolar Excitons and Hybridized Interlayer Mott Insulator in a Trilayer Moiré Superlattice
- Magnon damping in the zigzag phase of the Kitaev-Heisenberg- model on a honeycomb lattice
- Field-induced decay dynamics in square-lattice antiferromagnet
- Enhanced quantum control of individual ultracold molecules using optical tweezer arrays
- Enhancing a Many-body Dipolar Rydberg Tweezer Array with Arbitrary Local Controls
- Ground-state properties of the triangular-lattice Heisenberg antiferromagnet with arbitrary spin quantum number
- transitions in classical and quantum long-range systems
- Generalized Higgs mechanism in long-range interacting quantum systems
- Quantum Spin Dynamics Due to Strong Kitaev Interactions in the Triangular-Lattice Antiferromagnet CsCeSe
- Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator
- Magnetism in the two-dimensional dipolar XY model
- Hydrodynamic sound modes and Galilean symmetry breaking in a magnon fluid
- Rotor/spin-wave theory for quantum spin models with U(1) symmetry
- Spontaneous magnon decays in planar ferromagnet
- Supersolidity in Rydberg tweezer arrays