Author

Ian A. Walmsley

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Preprint Sep 2026

Improving the Loss Tolerance of Heralded Photonic GHZ States for Long-Distance Device-Independent Conference Key Agreement

Heralded multipartite entanglement distribution is a key requirement for device-independent conference key agreement (DI-CKA) over lossy quantum networks. Although locally equivalent in the absence of loss, different single-rail photon-number encodings of Greenberger--Horne--Zeilinger (GHZ) states respond differently t...

Yazeed K. Alwehaibi, Makoto Ishihara, S. Daryanoosh et al. · 0 citations

Preprint Sep 2026

Efficient Heralding of Loss-Tolerant Photonic GHZ States for Device-Independent Conference Key Agreement over Long Distances

Heralded multipartite entanglement distribution is a key requirement for device-independent conference key agreement (DI-CKA) over lossy quantum networks. Although locally equivalent in the absence of loss, different single-rail photon-number encodings of Greenberger-Horne-Zeilinger (GHZ) states can exhibit substantial...

Yazeed K. Alwehaibi, Makoto Ishihara, S. Daryanoosh et al. · 0 citations

Preprint Jul 2026

The trainability of photonic quantum circuits

Variational quantum algorithms are a leading approach to near-term quantum computing, but their scalability can be limited by barren plateaus and the sampling cost of resolving small changes in the loss landscape. Here, we study the trainability of passive linear-optical quantum circuits and introduce a framework based...

Alexander Makarovskiy, Adam J. Taylor, Zheng-Hao Li et al. · 1 citation