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Accepted · first revision · record

Title: Fractional quantum Hall states of light with many photons
Plain: Light trapped in a twisted cavity and made to interact through Rydberg atoms has formed a two-photon version of a fractional quantum Hall state. The goal is to build one with many photons and check its unusual properties.
Precise: Bosonic Laughlin state at filling $\nu = 1/2$ of Rydberg polaritons in a twisted (non-planar) optical cavity. Prepare it with $N \ge 10$ photons and verify topological order through the fractional braiding phase or edge excitations. Answer: achieved $N$ and fidelity, and the loss process limiting further growth.
Settled by: Measurement of a fractional braiding phase or chiral edge spectrum in a photonic fluid of at least 10 particles.
Kind: well-posed
Answer type: yes-no
References: (empty)
Literature status: open
Status note: Two-photon Laughlin states were observed in 2020 (Clark et al., Nature).
Posed since: (empty)