论文标题
在动量空间量子步行中观察到的轻换移动行为
Light-shift induced behaviors observed in momentum-space quantum walks
论文作者
论文摘要
在过去的十年中，量子步行（QW）的研究取得了许多进步，其中包括最近在我们的旋转玻璃体冷凝水系统中实现的动量空间QW。 QW具有普遍同意理论预测的行为。但是，它还显示了该理论没有充分解释的动量分布。我们提出了一个理论模型，该模型证明了旋转冷凝物的相干动力学足以解释实验数据，而无需像原始理论一样调用原子的热云。我们的数值发现得到了对零温度冷凝物极限的动量分布的分析预测的支持。当前的模型为动量空间QW提供了更完整的解释，这些QW可以应用于浮力驱动系统中的量子搜索算法和拓扑阶段。
Over the last decade there have been many advances in studies of quantum walks (QWs) including a momentum-space QW recently realized in our spinor Bose-Einstein condensate system. This QW possessed behaviors that generally agreed with theoretical predictions; however, it also showed momentum distributions that were not adequately explained by the theory. We present a theoretical model which proves that the coherent dynamics of the spinor condensate is sufficient to explain the experimental data without invoking the presence of a thermal cloud of atoms as in the original theory. Our numerical findings are supported by an analytical prediction for the momentum distributions in the limit of zero-temperature condensates. This current model provides more complete explanations to the momentum-space QWs that can be applied to study quantum search algorithms and topological phases in Floquet-driven systems.
