非调制光晶格中中性原子相干定向输运产生长距离纠缠
Long distance entanglement generation through coherent directed transport of Neutral atoms in unmodulated optical lattices
摘要：
通过在系统的自由演化过程中对晶格势进行有规律的相移，我们提出了一种在光晶格中定向输运局域原子的完全相干方法。这为实现一种可能的冷原子量子计算机铺平了道路，在这种计算机中，纠缠门通过将两个单独的原子彼此靠近并让它们相互作用来运行。我们的协议的速度是由原子的隧穿振幅，因此是远远快于自旋链中的超交换相互作用所导致的动力学的速度。我们的计划是强大的对可能的缺陷，也许它的主要优点是它的简单性，其所有的要求已经在最近的实验中实现。
英文摘要：
We introduce a fully coherent way for directed transport of localized atoms in optical lattices by regularly performing phase shifts on the lattice potential during the free evolution of the system. This paves the way for realizing a possible cold atom quantum computer in which entangling gates operate by bringing two individual atoms in the proximity of each other and letting them to interact. The speed of our protocol is determined by the tunneling amplitudes of the atoms and thus is much faster than the speed of the dynamics resulted from superexchange interaction in spin chains. Our scheme is robust against possible imperfections and perhaps its main advantage is its simplicity where all of its requirements have been already achieved in recent experiments.
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