{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"cf82f656a9c5a0d1a1858c187a51e0129a8eecc2f5f872365fa0ec88e85959e7","created":"2026-10-03T07:17:53Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"6ebb26539f69b8ed9dd68e73862b658e2c24c8a883c81e7dfceb28714bed70ea","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"amo.cavity-photon-matter.photonic-laughlin-scaling","kind":"well-posed","literature_status":"open","n":"1","parents":[],"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.","posed_since":"","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.","problem_ref":null,"references":"","settled_by":"Measurement of a fractional braiding phase or chiral edge spectrum in a photonic fluid of at least 10 particles.","status_note":"Two-photon Laughlin states were observed in 2020 (Clark et al., Nature).","title":"Fractional quantum Hall states of light with many photons","topic_ref":"8df59b7655cdc4331866853909e22dff07fb2d661e37f2a43fdc664ddd9f7dda"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"6b418d7d80706311b6269f7a9724844db60ee76ea046028b21bad49bbaba4c1d","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"24c2f66701289432b322612960f0aac35047b4070d02bba775ddcb677222b274","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"J0Z_JOE7z62kkqfTXf8Ad6ebHR-zFXKD-hD-1ygZVC__iv4pnYxOeczipHayf2RvQa5w73EL8NVMGISJdqvjBw"},"schema":"pubphys.envelope/1"},"record_hash":"6b418d7d80706311b6269f7a9724844db60ee76ea046028b21bad49bbaba4c1d","leaf_index":386}