Title: An efficient cooling of the quantized vibration by a four-level configuration Show Chinese title

Title: 由四能级构型实现的量子振动的有效冷却

Abstract: Cooling vibrational degrees of freedom down to ground states is essential to observation of quantum properties of systems with mechanical vibration. We propose two cooling schemes employing four internal levels of the systems, which achieve the ground-state cooling in an efficient fashion by completely deleting the carrier and first-order blue-sideband transitions. The schemes, based on the quantum interference and Stark-shift gates, are robust to fluctuation of laser intensity and frequency. The feasibility of the schemes is justified using current laboratory technology. In practice, our proposal readily applies to an nano-diamond nitrogen-vacancy center levitated in an optic trap or attached to a cantilever. Show Chinese abstract

Abstract: 将机械振动系统的振动自由度冷却到基态对于观测其量子性质至关重要。 我们提出了两种利用系统四个内部能级的冷却方案，通过完全消除载波和一级蓝边带跃迁，以高效实现基态冷却。 这些方案基于量子干涉和Stark移位门，对激光强度和频率波动具有鲁棒性。 使用当前实验室技术验证了这些方案的可行性。 实际上，我们的提议可以轻松应用于光学陷阱中悬浮的纳米金刚石氮空位中心或附着在悬臂上的情况。