论文标题
通过泵调制在标准的光学机械系统中进行强挤压
Strong mechanical squeezing in a standard optomechanical system by pump modulation
论文作者
论文摘要
对于泵激光器的振幅调制有益，我们在标准的光学机械系统中提出了一个简单而令人惊讶的机械挤压方案。通过仅将特定类型的定期调制引入单色调驱动场以冷却机械的Bogoliubov模式，可以对超出3 dB强的机械挤压超出3 dB的距离进行设计，而无需任何其他技术。具体而言，我们发现挤压的量不仅取决于有效的光力耦合的数量级，而且还强烈取决于边带强度的比率。为了最大程度地提高机械挤压，我们分别在数值和分析上优化了稳态方案的比率。我们计划中设计的机械挤压也具有很强的鲁棒性，并且可以在高浴温度下生存。与基于两色调泵技术的先前方案相比，我们的方案涉及更少的外部控制激光源，并且可以扩展到其他量子系统以达到强挤压效果。
Being beneficial for the amplitude modulation of the pump laser, we propose a simple yet surprisingly effective mechanical squeezing scheme in a standard optomechanical system. By merely introducing a specific kind of periodic modulation into the single-tone driving field to cool down the mechanical Bogoliubov mode, the far beyond 3-dB strong mechanical squeezing can be engineered without requiring any additional techniques. Specifically, we find that the amount of squeezing is not simply dependent on the order of magnitude of the effective optomechanical coupling but strongly on the ratio of sideband strengths for it. To maximize the mechanical squeezing, we numerically and analytically optimize this ratio in the steady-state regime, respectively. The mechanical squeezing engineered in our scheme also has strong robustness and can survive at a high bath temperature. Compared with previous schemes based on the two-tone pump technique, our scheme involves fewer external control laser source and can be extended to other quantum systems to achieve strong squeezing effect.
