Strong angular momentum optomechanical coupling for macroscopic quantum control

• URL: http://arxiv.org/abs/2109.14166v1
• Date: Wed, 29 Sep 2021 03:18:48 GMT
• Title: Strong angular momentum optomechanical coupling for macroscopic quantum control
• Authors: Yuan Liu, Yaoming Chu, Shaoliang Zhang, Jianming Cai
• Abstract summary: We propose a quantum optomechanical system involving exchange interaction between spin angular momentum of light and a torsional oscillator. We demonstrate that this system allows coherent control of the torsional quantum state of a torsional oscillator on the single photon level. Our work provides a platform to verify the validity of quantum mechanics in macroscopic systems on the micrometer and even centimeter scale.
• Score: 5.693393434312775
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Optomechanical systems offer unique opportunities to explore macroscopic quantum state and related fundamental problems in quantum mechanics. Here, we propose a quantum optomechanical system involving exchange interaction between spin angular momentum of light and a torsional oscillator. We demonstrate that this system allows coherent control of the torsional quantum state of a torsional oscillator on the single photon level, which facilitates efficient cooling and squeezing of the torsional oscillator. Furthermore, the torsional oscillator with a macroscopic length scale can be prepared in Schr\"odinger cat-like state. Our work provides a platform to verify the validity of quantum mechanics in macroscopic systems on the micrometer and even centimeter scale.

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