Centre for Quantum Computation and Communication Technology (Australian Research Council), Centre for Quantum Dynamics, Griffith University, Brisbane QLD 4111, Australia.
Phys Rev Lett. 2013 May 31;110(22):220402. doi: 10.1103/PhysRevLett.110.220402. Epub 2013 May 29.
Complementarity restricts the accuracy with which incompatible quantum observables can be jointly measured. Despite popular conception, the Heisenberg uncertainty relation does not quantify this principle. We report the experimental verification of universally valid complementarity relations, including an improved relation derived here. We exploit Einstein-Poldolsky-Rosen correlations between two photonic qubits to jointly measure incompatible observables of one. The product of our measurement inaccuracies is low enough to violate the widely used, but not universally valid, Arthurs-Kelly relation.
互补性限制了不兼容量子可观测量可以被联合测量的准确度。尽管人们普遍认为，海森堡不确定性原理并没有量化这一原理。我们报告了普遍有效的互补性关系的实验验证，包括这里推导出的一个改进关系。我们利用两个光子量子位之间的爱因斯坦-波多尔斯基-罗森相关性来联合测量一个量子位的不兼容可观测量。我们的测量误差的乘积足够低，以至于违反了广泛使用但不是普遍有效的阿瑟斯-凯利关系。
