2025/04/08 by J. Xu, Xu, Jiate, Guolong Li +2
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Mechanical and Optical Resonators #Nonlinear Photonic Systems #Optics (physics.optics) #Quantum Physics (quant-ph) #Vibration Control and Rheological Fluids
paper · pdf · doi:10.48550/arxiv.2504.06484
openalex publication_date 2025/04/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Cooling massive oscillators to quantum ground state is a key step for their precise control and quantum application. Recent work found that the center-of-mass motion of a levitated magnetic sphere can be cooled via magnon-cavity coupling. In this work, we demonstrate that a enhanced cooling can be realized by exploiting self-Kerr nonlinearity of magnon mode, observed in a ferrimagnetic yttrium-iron-garnet (YIG) sphere. By means of proper pump driving, the self-Kerr nonlinearity is mapped into degenerate magnon squeezing, leading to considerable enhancement of cooling via optimizing system parameters. Moreover, this Kerr nonlinear effect also brings enhanced cooling in the sideband-unresolved regime where the mechanical frequency is smaller than the cavity decay rate. These results provide new way to quantum technologies in terms of storage schemes and ultrasensitive measurements.