{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"cb4480986804c47798efdeee2a26cc410787d1b863a33e0691dff0531224ac57","created":"2026-10-03T07:17:50Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"5b3b3c8c120822d73a3bdf39ec4772a721da64e153e6096aa59b16cb91b6ce53","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"cm.amorphous-low-temperature","field":"cm","n":"1","review_cite":"R. O. Pohl, X. Liu and E. Thompson, Low-temperature thermal conductivity and acoustic attenuation in amorphous solids, Reviews of Modern Physics, 2002","review_link":"https://doi.org/10.1103/RevModPhys.74.991","review_verified":"true","summary":"Below about 1 K, glasses of every chemical kind store heat, conduct heat and absorb sound in almost the same way, very differently from crystals. A model of small groups of atoms tunneling between two nearby positions fits the data, but nobody knows what these tunneling objects are or why their strength is the same in every glass.","title":"Universal low-temperature anomalies of amorphous solids","topic_ref":null,"why":"Universality across chemically unrelated solids points to physics independent of specific structure, and the same defects limit superconducting qubits."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"d5ba98a0b7fd03c8a459d017fd4e5e33d6f390cd71005b8a63b71f0973f4abf6","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"85e5150c1c11fab64e65e2410c74175a45ee7eb3405341b2c4d282541da84993","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"wUcK0FCrujnydC-5QBHNzeqIOPo9q6YBVLCukNv2chPO5KwdDYjXVw9kqqQwikXWw3_tMALR73WEi_wzo0jtAw"},"schema":"pubphys.envelope/1"},"record_hash":"d5ba98a0b7fd03c8a459d017fd4e5e33d6f390cd71005b8a63b71f0973f4abf6","leaf_index":116}