论文标题
在旋转陷阱中的原子制备1/2-laughlin状态
Preparation of the 1/2-Laughlin state with atoms in a rotating trap
论文作者
论文摘要
分数量子厅系统是最令人兴奋的密切相关系统之一。通过具有超电原子的量子模拟在显微镜下访问它们将是更好地理解这种密切相关的物质状态的重要成就。一种有前途的方法是将少量的骨气原子限制在准二维旋转陷阱中，从而模拟磁场。对于接近平面陷阱频率的旋转频率，预计基态是劳克林状态的效率类似物。在这里，我们通过促进旋转频率并控制捕获电位的椭圆度来研究劳林状态的绝热制备问题。通过使用适应的坡道速度来获得旋转频率和椭圆度以及较大的陷阱变形，我们将高保真度劳克林状态的准备时间与先前的研究相比提高了十倍。随着绝热协议的这种改进，可以通过当前的实验技术来准备劳林状态。
Fractional quantum Hall systems are among the most exciting strongly correlated systems. Accessing them microscopically via quantum simulations with ultracold atoms would be an important achievement toward a better understanding of this strongly correlated state of matter. A promising approach is to confine a small number of bosonic atoms in a quasi-two-dimensional rotating trap, which mimics the magnetic field. For rotation frequencies close to the in-plane trapping frequency, the ground state is predicted to be a bosonic analog of the Laughlin state. Here, we study the problem of the adiabatic preparation of the Laughlin state by ramping the rotation frequency and controlling the ellipticity of the trapping potential. By employing adapted ramping speeds for rotation frequency and ellipticity, and large trap deformations, we improve the preparation time for high-fidelity Laughlin states by a factor of ten in comparison to previous studies. With this improvement of the adiabatic protocol the Laughlin state can be prepared with current experimental technology.
