{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"2ec19677d4d2b40058ae120f2ffcf33d8cf2d79c3d81f59793f8a9e99c784a17","created":"2026-10-03T07:17:54Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"9e9f43d0412bd8a55c083c1b89f552cca45ca3448ed86092499e12059c36c2ac","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"amo.rydberg-arrays.kagome-blockade-liquid","kind":"well-posed","literature_status":"contested","n":"1","parents":[],"plain":"Atoms on a kagome lattice (corner-sharing triangles) that block their neighbours from being excited showed, in early calculations, a disordered region that might be a quantum spin liquid. Later calculations found glassy behaviour or no liquid at all.","posed_since":"2021","precise":"H = sum_i (Omega/2) X_i - Delta n_i + sum_i<j (C_6/r_ij^6) n_i n_j on the kagome lattice, in the dense-excitation window between valence-bond-solid phases identified by Samajdar et al. (PNAS 2021). Determine the ground state there: $Z2$ spin liquid, glass-like state from many nearly degenerate solids, or a crystal. Answer: phase identification with topological entanglement entropy or order parameters from large-size numerics.","problem_ref":null,"references":"","settled_by":"Large-scale quantum Monte Carlo or 2D tensor-network calculations with the full $1/r^{6}$ tails that agree on the phase in this window.","status_note":"Samajdar et al. (PNAS 2021, arXiv:2011.12295) found a large-entanglement regime with no local order; Yan et al. (PRL 130, 206501, 2023) found glassy behaviour, and recurrent neural network wave functions found no evidence of a spin liquid (Hibat-Allah et al., Commun. Phys. 2025).","title":"Liquid, glass or crystal in blockaded Rydberg atoms on a kagome lattice","topic_ref":"aba79dca07eab347d6af84ae9ca2c4df61b91870ce2163a22ff37ce7f5bc8f72"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"9198c795e1f49c19cfa0eb2f93e2501f110fc3a2895076cf34f62dbc7c74f84b","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"7862f8bf79c0f908031691143b6b9650e7ed602cb0898027e3e4021ae049d4d2","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"PzlQTphFJEkEipXHmcYc6_MXVq_GjP2dlD6MrL5298klnjWL1Wd0thYlL_lPaPcnCnT0q2U3dwes_f_EGeopCQ"},"schema":"pubphys.envelope/1"},"record_hash":"9198c795e1f49c19cfa0eb2f93e2501f110fc3a2895076cf34f62dbc7c74f84b","leaf_index":453}