论文标题
相干电子位移，用于使用Attosend单周期脉冲处理量子信息处理
Coherent electron displacement for quantum information processing using attosecond single cycle pulses
论文作者
论文摘要
相干电子位移是处理量子信息的常规策略，因为它可以在原子网络中互连不同的位点。处理的效率取决于尚未确定的机制的精确控制。在这里，我们从理论上展示了一种新的途径，可以通过利用AttoSeend单周期脉冲来驱动时间尺度上的电子位移的时间比电子波袋的动态变形快。这些脉冲的特征依赖于向电子的巨大动量转移，导致其单向路径的位移。通过揭示编码量子叠加态的流离失所波袋的时空性质来说明这种情况。我们绘制相关的阶段信息，并在远离原点的长距离内检索。此外，我们表明，应用于离子链的一系列脉冲可以对电子波袋在相邻位点之间来回的相干运动的方向性进行控制。两电子旋转状态的扩展证明了这些脉冲使用的多功能性。我们的发现建立了一种有前途的途径，可以使用Attsond单周期脉冲对量子状态进行高级控制，这为量子信息和成像的超快处理铺平了道路。
Coherent electron displacement is a conventional strategy for processing quantum information, as it enables to interconnect distinct sites in a network of atoms. The efficiency of the processing relies on the precise control of the mechanism, which has yet to be established. Here, we theoretically demonstrate a new route to drive the electron displacement on a timescale faster than that of the dynamical distortion of the electron wavepacket by utilizing attosecond single-cycle pulses. The characteristic feature of these pulses relies on a vast momentum transfer to an electron, leading to its displacement following a unidirectional path. The scenario is illustrated by revealing the spatiotemporal nature of the displaced wavepacket encoding a quantum superposition state. We map out the associated phase information and retrieve it over long distances from the origin. Moreover, we show that a sequence of such pulses applied to a chain of ions enables attosecond control of the directionality of the coherent motion of the electron wavepacket back and forth between the neighbouring sites. An extension to a two-electron spin state demonstrates the versatility of the use of these pulses. Our findings establish a promising route for advanced control of quantum states using attosecond single-cycle pulses, which pave the way towards ultrafast processing of quantum information as well as imaging.
