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arXiv 1602.08833physics.opticsquant-ph
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倏逝耦合波导中的高效捷径技术

Efficient shortcut techniques in evanescently coupled waveguides

Koushik Paul, Amarendra K. Sarma

摘要:

近几年来,在相干控制原子系统的背景下,绝热通道(SHAPE)技术得到了相当大的关注。这主要是因为与绝热过程相比,它能够无限快地操纵量子态之间的布居。在这方面,有两种方法进行了严格的探索,即无跃迁量子驱动和Lewis-Reisenfeld不变量方法。我们将这两种方法应用于绝热波导耦合器中实现SHAPE。波导耦合器是光子电路的组成部分,主要用作开关器件。我们的研究表明,适当的耦合系数和耦合器的传播常数的工程,它是可能实现高效和完整的功率开关。我们还观察到,耦合器的长度可以显着减少,而不影响系统的耦合效率。

英文摘要:

Shortcut to Adiabatic Passage (SHAPE) technique, in the context of coherent control of atomic systems has gained considerable attention in last few years. It is primarily because of its ability to manipulate population among the quantum states infinitely fast compared to the adiabatic processes. Two methods in this regard have been explored rigorously, namely the transitionless quantum driving and the Lewis-Reisenfeld invariant approach. We have applied these two methods to realize SHAPE in adiabatic waveguide coupler. Waveguide couplers are integral components of photonic circuits, primarily used as switching devices. Our study shows that with appropriate engineering of the coupling coefficient and propagation constants of the coupler it is possible to achieve efficient and complete power switching. We also observed that the coupler length could be reduced significantly without affecting the coupling efficiency of the system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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