Enhanced cooling via self-Kerr nonlinearity in cavity-magnomechanical system

• URL: http://arxiv.org/abs/2504.06484v1
• Date: Tue, 08 Apr 2025 23:12:46 GMT
• Title: Enhanced cooling via self-Kerr nonlinearity in cavity-magnomechanical system
• Authors: Jiate Xu, Xinqian Cui, Guolong Li,
• Abstract summary: Recent work found that the center-of-mass motion of a levitated magnetic sphere can be cooled via magnon-cavity coupling.<n>In this work, we demonstrate that a enhanced cooling can be realized by exploiting self-Kerr nonlinearity of magnon mode.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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