We use the dynamical invariants associated with the Hamiltonian of an atom in a one dimensional moving trap to inverse engineer the trap motion and perform fast atomic transport without final vibrational heating. The atom is driven non-adiabatically through a shortcut to the result of adiabatic, slow trap motion. For harmonic potentials this only requires designing appropriate trap trajectories, whereas perfect transport in anharmonic traps may be achieved by applying an extra field to compensate the forces in the rest frame of the trap. The results can be extended to atom stopping or launching. The limitations due to geometrical constraints, energies and accelerations involved are analyzed, as well as the relation to previous approaches (based on classical trajectories or "fast-forward" and "bang-bang" methods) which can be integrated in the invariant-based framework.
Coupling a single atomic quantum bit to a high finesse optical cavity
四极S $_{1/2}$ - D $_{5/2}$光学跃迁的一个单一的捕获的钙$^+$离子，非常适合于编码量子比特的信息，相干耦合到驻波场的高精细度腔。通过观察离子对腔内场的空间和时间变化的响应来验证耦合。我们还实现了确定性的耦合腔模式的离子的振动状态，通过选择性地激发振动状态变化的过渡，并通过控制离子的位置，在驻波领域与纳米精度。
Fast and Coherent Transfer of Atomic Qubits in Optical Tweezers using Fiber Array Architecture
Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences（中国科学院精密测量科学与技术创新研究院武汉物理与数学研究所）；University of Chinese Academy of Sciences（中国科学院大学）
Influence of monolayer contamination on electric-field-noise heating in ion traps
电场噪声是基于纠缠态囚禁离子的大规模量子计算机组装的一个障碍。除了无处不在的技术噪声源，捕获离子加热的实验研究已经揭示了额外的限制这种噪声的贡献，源自电极表面上的原子过程。在最近的工作[A。Safavi-Naini等人，Phys. Rev. A 84，023412（2011）]描述了这种过量电场噪声的微观模型，其指出了一种更系统地理解表面吸附物作为电场抖动噪声的祖先的方法。在这里，我们解决了表面单层污染吸附物引起的噪声过程的影响。通过使用精确的数值计算的H和N原子单层的Au（111）表面上的物理吸附和化学吸附的相反的极端，我们表明，一个额外的单层可以显着影响噪声功率谱和增强或抑制所产生的加热速率。
