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Generation of a hybrid W entangled state of three photonic qubits with different encodings

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Abstract

The W-type entangled states are very useful in quantum computing and quantum communication. Many works have been devoted to preparing non-hybrid W states (i.e., all qubits with the same encoding) in various physical systems. On the other hand, hybrid W entangled states are key ingredients for hybrid quantum computing and quantum communication. In this work, we propose to create a hybrid W entangled state of three photonic qubits each with a different encoding. The hybrid W state is prepared by employing three microwave cavities coupled to a superconducting flux qutrit (i.e., a three-level quantum system). This proposal requires only a single qutrit to couple the three cavities, thus the system architecture is greatly simplified. Since there is no need of making any measurement, the W state is created deterministically. As an example, our numerical simulation demonstrates that within current experimental technology, the proposed hybrid W state can be created with a high fidelity. This proposal is universal and can be applied to create the proposed hybrid W state, by using three microwave or optical cavities coupled to a three-level natural or artificial atom.

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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: No data are used to produce any result in the paper. All the figures in the manuscript are produced using the equations derived in the manuscript.]

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Funding

This work was partly supported by the National Natural Science Foundation of China (NSFC) (11374083, 11774076, U21A20436), Innovation Program for Quantum Science and Technology (2021ZD0301705), and the Jiangsu Funding Program for Excellent Postdoctoral Talent.

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Author notes

  1. Qi-Ping Su and Liang Bin contributed equally to this work.

Authors and Affiliations

  1. School of Physics, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, China

    Qi-Ping Su, Meng-Yun Ma & Chui-Ping Yang

  2. Department of Physics, Fuzhou University, Fuzhou, 350002, China

    Liang Bin

  3. Institute for Quantum Science and Technology, University of Calgary, Alberta, T2N 1N4, Canada

    Qi-Ping Su

  4. School of Physics, Nanjing University, Nanjing, 210093, China

    Yu Zhang

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  1. Qi-Ping Su
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  2. Liang Bin
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Correspondence to Chui-Ping Yang.

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Su, QP., Bin, L., Zhang, Y. et al. Generation of a hybrid W entangled state of three photonic qubits with different encodings. Quantum Inf Process 23, 16 (2024). https://doi.org/10.1007/s11128-023-04227-3

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