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arXiv 1802.08779physics.atom-phcond-mat.quant-gas
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将原子嵌入光晶格

Shortcut loading atoms into an optical lattice

Xiaoji Zhou, Shengjie Jin, J. Schmiedmayer

摘要:

我们提出了一个有效的和快速的(几微秒)的程序,用于转移超冷原子从基态的谐波陷阱到所需的光晶格的频带。我们的快捷方法是一个设计的脉冲序列,其中的持续时间和间隔,在每一步都充分优化,以最大限度地提高鲁棒性和保真度的最终状态相对于目标状态。原子可以被制备在具有偶宇称或奇宇称的单个能带中,并且可以制备和操纵不同能带的叠加态。此外,我们将这一思想推广到二维或三维光晶格的情况,其中的激发态的能量是简并的。我们实验证明了各种例子,并表现出非常好的协议与理论模型。高效的快捷方法将在量子系统的制备、量子信息处理、精确测量中找到应用,并作为研究激发带动力学的起点。

英文摘要:

We present an effective and fast (few microseconds) procedure for transferring ultra-cold atoms from the ground state in a harmonic trap into the desired bands of an optical lattice. Our shortcut method is a designed pulse sequence where the time duration and the interval in each step are fully optimized in order to maximize robustness and fidelity of the final state with respect to the target state. The atoms can be prepared in a single band with even or odd parity, and superposition states of different bands can be prepared and manipulated. Furthermore, we extend this idea to the case of two-dimensional or three-dimensional optical lattices where the energies of excited states are degenerate. We experimentally demonstrate various examples and show very good agreement with the theoretical model. Efficient shortcut methods will find applications in the preparation of quantum systems, in quantum information processing, in precise measurement and as a starting point to investigate dynamics in excited bands.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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