{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"c2cede51cb45640c4ad8ad65f4600b4b464807560188999c470a78a2233fd2c2","created":"2026-10-03T07:17:53Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"da163ac5fa4b97afd6de6c7c739bb98925e190bfbf18091baa91e5a9f694639b","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"stat.fput-thermalization","field":"stat","n":"1","review_cite":"W. Fu, Z. Wang, W. Lin, D. He, J. Wang, Y. Zhang, H. Zhao, The Fermi-Pasta-Ulam-Tsingou problem after 70 years: toward universal laws of thermalization in lattice systems in the thermodynamic limit, arXiv, 2026","review_link":"https://arxiv.org/abs/2603.23347","review_verified":"true","summary":"In 1955 Fermi, Pasta, Ulam and Tsingou simulated a chain of weakly nonlinear springs expecting energy to spread evenly among all vibration modes, and found it kept returning to where it started. How long such nearly solvable systems take to reach thermal equilibrium, and whether they always do, is still being settled.","title":"Thermalization of nearly integrable lattices (FPUT)","topic_ref":null,"why":"It tests the basic assumption of statistical mechanics that weak interactions are enough to bring a large system to thermal equilibrium."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"b026e7f128afdc43ebc73cc909210ea680a0ba040cd45dc5b34d5a420020f836","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"a677084cbb09ef6c228046c9a1956e9e4a63cd37126ff4e9422bfb138009a234","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"Cfbaw2qp2-6guR1Y0bSPi1QaVnmYW2ZPMWGE37wp0EjUXZPQBT3z-VtKy6SaUpBh3soEmZ_AOcz9A_b63CxOCA"},"schema":"pubphys.envelope/1"},"record_hash":"b026e7f128afdc43ebc73cc909210ea680a0ba040cd45dc5b34d5a420020f836","leaf_index":352}