Simultaneous excitation of two noninteracting atoms with time-frequency correlated photon pairs in a superconducting circuit

Abstract

Here 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 quantum Zeno effect of inhibiting 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.

arXiv comment5 pages, 3 figures

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• Ultranarrow spectral line of the radiation in double qubit-cavity ultrastrong coupling system
• Generation of time-frequency entangled photon pairs propagating in separate waveguides in circuit QED setup
• Robust biexciton preparation for entangled photon-pair generation by single-shot Floquet driving
• Time-frequency-correlated Native CCZ Gate in Superconducting Circuits