{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"266977a97683be3ee2c2e3c062c17b60ea5c911209157bee60cd359d73b7674a","created":"2026-10-03T07:17:54Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"9c818f24fb6ac1040bb8056c6b9bf7161e4695c27020ae985ab77e9b4dfcc250","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"amo.rydberg-arrays.square-lattice-transitions","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"On a square grid, Rydberg atoms form several ordered patterns. The transitions into some of them may be smooth or abrupt, and this is not settled.","posed_since":"","precise":"Square-lattice Rydberg arrays with $R_b/a = 1.2 \\text{ to } 1.8$. For transitions from the disordered phase into the striated and star phases, determine whether they are continuous or first order and, if continuous, the universality class (exponents $\\nu, \\eta$). Answer: classification with exponents.","problem_ref":null,"references":"","settled_by":"Quantum Monte Carlo or 2D tensor-network finite-size scaling, with Kibble-Zurek scaling on arrays of at least 256 atoms.","status_note":"","title":"Nature of the striated and star transitions in square Rydberg arrays","topic_ref":"aba79dca07eab347d6af84ae9ca2c4df61b91870ce2163a22ff37ce7f5bc8f72"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"3cffdadbc995ce1b84ee6a5a55b559368771dba68afeba1a9ae379a558c2f446","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"c74fb32055980cffb22d988b7c7f099512e99c9010632a6ae2472d76f81bc7fe","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"utNWlEy5uezoYi1c9uDWLMmyI98t2tTycY5hrrpqOidJfw-Xzx2FePbxOoQ7k1kuI2ljXxvTYLiWNkUKyhORDA"},"schema":"pubphys.envelope/1"},"record_hash":"3cffdadbc995ce1b84ee6a5a55b559368771dba68afeba1a9ae379a558c2f446","leaf_index":456}