{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"e6583cf27fffa9b6bf964ed79ff0adabe3b6bb893d960868a09f6216a4785396","created":"2026-10-03T07:17:58Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"f90f0c59af4567831e48ad5d6c015f1f2415b2b9e938ef27a94ba717255568a6","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"chem.nonadiabatic-dynamics.charge-migration-lifetime","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"An ultrashort laser pulse can knock out an electron and leave the remaining charge sloshing across the molecule within a few femtoseconds (millionths of a billionth of a second). How long this sloshing survives once the atoms start to move is not known.","posed_since":"","precise":"For a medium-size organic molecule (for example phenylalanine or a substituted benzene) ionized by an attosecond XUV pulse, compute and measure the decay time $\\tau_{coh}$ of the hole-density coherence between the lowest cationic states as nuclear motion and nuclear wavepacket spread are included. The answer is $\\tau_{coh}$ with its dependence on molecular size and the number of active vibrational modes.","problem_ref":null,"references":"","settled_by":"Attosecond pump-probe measurements of hole migration compared with full-dimensional quantum electron-nuclear dynamics for the same molecule.","status_note":"","title":"Lifetime of electronic coherence after sudden ionization of molecules","topic_ref":"aa1669ae0dd7fb5df9048991b7b6472f6d13dde0228a4ba5521d38de86ed2a38"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"d3e01e09c1798a3a6151d28e3e49f461ca72d872e9b4aa9e78c3ae6e96a81d89","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"4177e0fa4fb8fd777e9a8f91242d4acf7e395c68699fd38f85a62226dd1fefea","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"PBUYfKybzLeA3o5oqE20dBSKPpk-NQ4X8ojc8nmG32VdEJLJdIJ71lf8BAFtzth5STBjz9qB4e6xvFC4SeCCAA"},"schema":"pubphys.envelope/1"},"record_hash":"d3e01e09c1798a3a6151d28e3e49f461ca72d872e9b4aa9e78c3ae6e96a81d89","leaf_index":878}