Abstract
We present an alternative scheme for generating quadripartite continuous variable entanglement using the dispersion interactions of four separated resonators with a single driven superconducting qubit. We show that the cluster and Greenberger-Horne-Zeilinger (GHZ) entangled states of four output microwave photons can be created at the presence of quantum relaxations. The physical mechanism is proposed in the dressed-state representation of driving interaction. With the proper choice of the physical parameters, the concurrent parametric down-conversion interactions occur among four microwave modes, which are responsible for the four-mode entanglement generation. In practice, our scheme provides a useful approach for the scalable information processing in the solid-state system.
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Zhong, WX., Cheng, GL. & Chen, AX. Quadripartite entanglement of microwave photons from separated resonators via concurrent parametric interactions in superconducting quantum circuits. Eur. Phys. J. D 68, 164 (2014). https://doi.org/10.1140/epjd/e2014-40834-y
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DOI: https://doi.org/10.1140/epjd/e2014-40834-y