2021/09/29 by Yuan Liu, Yaoming Chu, Liu, Yuan +5
Computer Science · Physics and Astronomy · #Experimental and Theoretical Physics Studies #Mechanical and Optical Resonators #Quantum Information and Cryptography #physics.optics #quant-ph
paper · pdf · doi:10.48550/arxiv.2109.14166
5 pages + 14 pages of appendices, 9 figures
arxiv created 2021/09/29 · arxiv updated 2021/09/30
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 Schrödinger 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.