We report the first observation of simultaneous excitation of two noninteracting atoms by a pair of time-frequency correlated photons in a superconducting circuit. The strong coupling regime of this process enables the synthesis of a three-body interaction Hamiltonian, which allows the generation of the tripartite Greenberger-Horne-Zeilinger state in a single step with a fidelity as high as 0.95. We further demonstrate the inhibition of the simultaneous two-atom excitation by continuously measuring whether the first photon is emitted. This work provides a new route in synthesizing many-body interaction Hamiltonian and coherent control of entanglement.

中文翻译：

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在超导电路中同时激发两个具有时频相关光子对的非相互作用原子

我们报告了由超导电路中的一对时频相关光子同时激发两个非相互作用原子的首次观察。此过程的强耦合机制能够合成三体相互作用的哈密顿量，从而可以在一个步骤中生成高达保真度高达0.95的三方格林伯格-霍恩-泽林格状态。通过进一步测量是否发射了第一光子，我们进一步证明了对同时存在的两个原子的激发的抑制。这项工作为综合多体相互作用哈密顿量和纠缠的连贯控制提供了一条新途径。