Zeng Yong, Xu Peng, He Xiaodong, Liu Yangyang, Liu Min, Wang Jin, Papoular D J, Shlyapnikov G V, Zhan Mingsheng
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.
Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
Phys Rev Lett. 2017 Oct 20;119(16):160502. doi: 10.1103/PhysRevLett.119.160502. Epub 2017 Oct 18.
We report on the first experimental realization of the controlled-not (cnot) quantum gate and entanglement for two individual atoms of different isotopes and demonstrate a negligible cross talk between two atom qubits. The experiment is based on a strong Rydberg blockade for ^{87}Rb and ^{85}Rb atoms confined in two single-atom optical traps separated by 3.8 μm. The raw fidelities of the cnot gate and entanglement are 0.73±0.01 and 0.59±0.03, respectively, without any corrections for atom loss or trace loss. Our work has applications for simulations of many-body systems with multispecies interactions, for quantum computing, and for quantum metrology.
我们报道了针对不同同位素的两个单个原子实现受控非门（CNOT）量子门及纠缠的首次实验，并证明了两个原子量子比特之间的串扰可忽略不计。该实验基于对囚禁在两个相距3.8μm的单原子光阱中的(^{87}Rb)和(^{85}Rb)原子的强里德堡阻塞效应。在未对原子损失或微量损失进行任何校正的情况下，CNOT门和纠缠的原始保真度分别为0.73±0.01和0.59±0.03。我们的工作在多物种相互作用的多体系统模拟、量子计算和量子计量学方面有应用。
