We investigate the evolution of an electron undergoing coherent tunneling via adiabatic passage (CTAP) using the solution of the one-dimensional Schroedinger equation in both space and time for a triple well potential. We find the eigenspectrum and complete time evolution for a range of different pulsing schemes. This also provides an example of a system that can be described with the tools from both quantum optics and condensed matter. We find that while the quantum optics description of the process captures most of the key physics, there are important effects that can only be correctly described by a more complete representation. This is an important point for applications such as quantum information processing or quantum control where it is common practice to use a reduced state space formulation of the quantum system in question.
Robust high-fidelity universal set of quantum gates through non-adiabatic rapid passage
我们展示了如何使用单一形式的非绝热快速通道来实现一个强大的高保真通用量子门集，其参数被优化以最大化门保真度和奖励门鲁棒性。通用集合中的每个门都以0.99988 < F < 0.99999范围内的保真度F工作，并且需要不超过14位（1/10，000）精度的控制参数。这样的精度是在商业上可用的任意波形发生器的范围内，因此，对这种高保真通用量子控制方法的实验研究似乎是可行的。
Coherent tunneling by adiabatic passage in an optical waveguide system
我们报告了工程三阱光波导结构中光传输的第一个实验演示，该结构提供了绝热通道相干隧穿（CTAP）的经典模拟，最近提出用于隧道耦合光阱或量子阱之间中性原子或电子的空间相干传输[A. D. Greentree等人，Phys.Rev.B70，235317（2004）; K.埃克特等人，A 70，023606（2004）]。通过我们简单的光学系统实现的CTAP波包动力学的直接可视化清楚地表明，在违反直觉的通道方案中，光波在两个外阱之间隧穿，而没有对中间阱的明显激发。
