Institut für Experimentalphysik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria.
Phys Rev Lett. 2011 Apr 1;106(13):130506. doi: 10.1103/PhysRevLett.106.130506. Epub 2011 Mar 31.
We report the creation of Greenberger-Horne-Zeilinger states with up to 14 qubits. By investigating the coherence of up to 8 ions over time, we observe a decay proportional to the square of the number of qubits. The observed decay agrees with a theoretical model which assumes a system affected by correlated, Gaussian phase noise. This model holds for the majority of current experimental systems developed towards quantum computation and quantum metrology.
我们报告了多达 14 个量子位的 GHZ 态的产生。通过研究长达 8 个离子随时间的相干性，我们观察到与量子位数的平方成正比的衰减。观察到的衰减与理论模型一致，该模型假设系统受到相关的、高斯相位噪声的影响。对于大多数目前朝着量子计算和量子计量学发展的实验系统，这个模型都是适用的。
