Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, People's Republic of China.
Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, People's Republic of China and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
Phys Rev Lett. 2013 Feb 15;110(7):070401. doi: 10.1103/PhysRevLett.110.070401. Epub 2013 Feb 11.
Using a single trapped ion, we have experimentally demonstrated state-independent violation of a recent version of the Kochen-Specker inequality in a three-level system (qutrit) that is intrinsically indivisible. Three ground states of the (171)Yb(+) ion representing a qutrit are manipulated with high fidelity through microwaves and detected with high efficiency through a two-step quantum jump technique. Qutrits constitute the most fundamental system to show quantum contextuality and our experiment represents the first one that closes the detection efficiency loophole for experimental tests of quantum contextuality in such a system.
使用单个囚禁离子，我们在一个不可分割的三能级系统（量子比特）中实验性地证明了最近版本的科亨-斯佩克尔不等式的状态无关违反。通过微波以高保真度操纵（171）Yb(+)离子的三个基态，代表量子比特，并通过两步量子跳跃技术以高效率检测。量子比特构成了展示量子语境性的最基本系统，我们的实验代表了第一个在该系统中关闭量子语境性实验测试的检测效率漏洞的实验。
