Description
Photonic W states are a class of multipartite entangled states with potential applications in quantum communication, quantum networking, and distributed quantum information processing [1]. We theoretically investigate the generation of a heralded dual-rail encoded three-photon photonic W state using a linear optical circuit with six photons in nine modes, where three photons are detected as heralds in three output modes. The interferometer is optimized to maximize the fidelity of the generated W state under ideal conditions. We then study the effects of partial photon distinguishability using the orthogonal bad-bit model [2]. This model allows us to quantify how imperfect photon indistinguishability affects the fidelity of the heralded output state. Our results characterize the degradation in state fidelity as photon distinguishability increases, providing insight into the robustness of the protocol against this experimental imperfection.
[1] Dür, W., Vidal, G., and Cirac, J. I. (2000). Three qubits can be entangled in two inequivalent ways. Phys. Rev. A 62, 062314.
[2] Sparrow, C. (2018). Simulating imperfect boson sampling. PhD thesis, Imperial College London.
| I am the presenting author | Yes |
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