Parametric instability in a magnomechanical system

Abstract

We study parametric instability in a magnomechanical system, specifically examining magnon tunneling between moving ferromagnetic insulators. Our analysis reveals that quantum fluctuations generate spin currents above a critical velocity threshold, while no spin currents occur below this threshold at low temperatures. The critical velocity depends on magnon stiffness and Zeeman energy. Approaching the threshold, the spin current becomes divergent, linked to the $PT$-symmetry-breaking transition. This enhanced behavior could offer high-sensitivity measurements and efficient spin current generation in magnon-based quantum technology.

10 pages, 5 figures

References in corpus (19)

• Cavity Optomechanics
• Hybrid quantum systems based on magnonics
• Magnon-photon-phonon entanglement in cavity magnomechanics
• Quantum magnonics: when magnon spintronics meets quantum information science
• Reheating in Inflationary Cosmology: Theory and Applications
• Microwave amplification with nanomechanical resonators
• Perspectives on quantum transduction
• Squeezed states of magnons and phonons in cavity magnomechanics
• Shearing the Vacuum - Quantum Friction
• Quantum entanglement between two magnon modes via Kerr nonlinearity
• Dissipation-based Quantum Sensing of Magnons with a Superconducting Qubit
• The Final Chapter In The Saga Of YIG
• Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale
• The Reality of Casimir Friction
• Quantization of the Electromagnetic Field in Non-dispersive Polarizable Moving Media above the Cherenkov Threshold
• Negative frequencies in wave propagation: a microscopic model
• Nonlocal Drag of Magnons in a Ferromagnetic Bilayer
• Parametric Couplings in Engineered Quantum Systems
• Optimising motion-induced spin transfer