Quantum-dot Cellular Automata (QCA) is an emerging nanotechnology with remarkable performance and energy efficiency. Computation and information transfer in QCA are based on field forces rather than electric currents. As a consequence, new strategies are required for design automation approaches in order to cope with the arising challenges. One of these challenges is the transport of information, which is affected by two particularities of the QCA technology. First, information flow in QCA is controlled by external clocks, and second, QCA is a planar technology in which gates, as well as interconnections, are mostly located in the same layer. The former demands proper synchronization already during the circuit design phase, while the latter results in high area costs for interconnections. This work focuses on both constraints and discusses its impact on the implementation of QCA circuits. Further, the concept of local and global synchronicity in QCA circuits is explored. The obtained results indicate that relaxing the global synchronicity constraint can reduce design size by about 70% while the throughput performance declines by similar values. Additionally, it can be shown that the impact of interconnections in QCA, like wires, fan-outs, and crossovers, is indeed substantial. That means, up to 75% of the total area is occupied by interconnections.

量子点元胞自动机（QCA）是一种新兴的纳米技术，具有卓越的性能和能效。QCA中的计算和信息传递是基于场力而不是电流。因此，设计自动化方法需要新的策略，以应对不断出现的挑战。这些挑战之一是信息的传输，这受QCA技术的两个特殊性影响。首先，QCA中的信息流是由外部时钟控制的，其次，QCA是一种平面技术，其中门以及互连大多位于同一层。前者在电路设计阶段就已经要求适当的同步，而后者导致互连的高成本。这项工作着重于两个约束，并讨论了其对QCA电路实施的影响。此外，还探讨了QCA电路中局部和全局同步的概念。获得的结果表明，放宽全局同步性约束可以使设计大小减少约70％，而吞吐量性能下降相似的值。此外，可以证明，在QCA中互连的影响确实很大，例如导线，扇出和交叉。这意味着互连最多占总面积的75％。获得的结果表明，放宽全局同步性约束可以使设计大小减少约70％，而吞吐量性能下降相似的值。此外，可以证明，在QCA中互连的影响确实很大，例如导线，扇出和交叉。这意味着互连最多占总面积的75％。获得的结果表明，放宽全局同步性约束可以使设计大小减少约70％，而吞吐量性能下降相似的值。此外，可以证明，在QCA中互连的影响确实很大，例如导线，扇出和交叉。这意味着互连最多占总面积的75％。