Recently, the Institute of Physics and Mathematics, Institute of Physics and Mathematics, Chinese Academy of Sciences, Research Group on Quantum Information Processing of the Bounding System, the National University of Defense Technology and the Beijing Research Center for Computational Science, proposed a new scheme for rapid cooling of nanomechanical vibrators. Express.

The paper is titled "Using the Kinetic Zeeman Effect to Quickly Cool Nanomechanical Oscillators", which was completed by Dr. Zhang Jianqi, Research Fellow of Wuhan Institute of Mathematics, Feng Mang, and researchers from National University of Defense Technology and Beijing Computational Science Research Center. Nanomechanical oscillators can exhibit both classic properties of macrophysics and quantum properties of microphysics. Therefore, the research on nanomechanical oscillators is not only of great physical significance, but also has broad application prospects. However, the quantum properties of nanomechanical oscillators are often submerged by thermal noise in the environment, so cooling nanomechanical oscillators efficiently and quickly is one of the current research hotspots. In the solution proposed in this paper, the diamond nitrogen vacancy color center is integrated at the vibrating end of the cantilever nanomechanical vibrator. The internal state of the heart is directly coupled with the vibration of the cantilever vibrator. Compared with some of the cooling solutions proposed by the predecessors, this work uses the quantum interference effect to suppress and strengthen the heating and cooling effects in the system by cleverly applying an external light field that satisfies the two-photon resonance condition, thereby achieving the nanomechanical vibrator's Faster cooling.

The research work was supported by the National Major Scientific Research Program "Capturing the Quantum State of a Single Atom (Ion) and Optical Coupling System", the National Natural Science Foundation of China and the China Postdoctoral Science Foundation "Cooling the Nano-mechanical Oscillator to the Ground State Using the Diamond Nitrogen Vacancy Center "Funding.

Figure (a) Schematic diagram of the scheme: The diamond nitrogen vacancy color center (NV) is integrated at the vibration end of the cantilever nanomechanical oscillator (MR), and the light field Ω + and Ω- are cleverly applied under the action of an external gradient magnetic field (MFG) , Can achieve faster cooling of the nano-mechanical vibrator.

(b) Internal level structure of diamond nitrogen vacancy color center (NV) under the action of light field.

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