{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:4AQUNY57W5BMQIMV2KVMCUX4K3","short_pith_number":"pith:4AQUNY57","schema_version":"1.0","canonical_sha256":"e02146e3bfb742c82195d2aac152fc56c0c359b8004f194507cafa30bc8c38ff","source":{"kind":"arxiv","id":"1802.02411","version":2},"attestation_state":"computed","paper":{"title":"Gauge-invariant formulation of time-dependent configuration interaction singles method","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Kenichi L. Ishikawa, Takeshi Sato, Takuma Teramura","submitted_at":"2018-02-07T13:22:14Z","abstract_excerpt":"We propose a gauge-invariant formulation of the channel orbital-based time-dependent configuration interaction singles (TDCIS) method [Phys. Rev. A 74, 043420 (2006)], one of the powerful ab initio methods to investigate electron dynamics in atoms and molecules subject to an external laser field. In the present formulation, we derive the equations of motion (EOMs) in the velocity gauge using gauge-transformed orbitals, not fixed orbitals, that are equivalent to the conventional EOMs in the length gauge using fixed orbitals. The new velocity-gauge EOMs avoid the use of the length-gauge dipole o"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1802.02411","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-02-07T13:22:14Z","cross_cats_sorted":[],"title_canon_sha256":"016940741b4dc25108a0b16987d5270322e73413f800d194713c187f69d9ca4e","abstract_canon_sha256":"503c6c7a3871254ca7471461fe991bd3cfef76cd602a156eae2181e41bdd473d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:03.644476Z","signature_b64":"KAlA03TDUPvR3MAD9gpHEucEGp7NUhahtP9PS+11Fmf+KKDALul9rBIMTFY7NuwrEMM2phr9cJoxMZMx1Tw0Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e02146e3bfb742c82195d2aac152fc56c0c359b8004f194507cafa30bc8c38ff","last_reissued_at":"2026-05-18T00:24:03.643860Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:03.643860Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Gauge-invariant formulation of time-dependent configuration interaction singles method","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Kenichi L. Ishikawa, Takeshi Sato, Takuma Teramura","submitted_at":"2018-02-07T13:22:14Z","abstract_excerpt":"We propose a gauge-invariant formulation of the channel orbital-based time-dependent configuration interaction singles (TDCIS) method [Phys. Rev. A 74, 043420 (2006)], one of the powerful ab initio methods to investigate electron dynamics in atoms and molecules subject to an external laser field. In the present formulation, we derive the equations of motion (EOMs) in the velocity gauge using gauge-transformed orbitals, not fixed orbitals, that are equivalent to the conventional EOMs in the length gauge using fixed orbitals. The new velocity-gauge EOMs avoid the use of the length-gauge dipole o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02411","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1802.02411","created_at":"2026-05-18T00:24:03.643958+00:00"},{"alias_kind":"arxiv_version","alias_value":"1802.02411v2","created_at":"2026-05-18T00:24:03.643958+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02411","created_at":"2026-05-18T00:24:03.643958+00:00"},{"alias_kind":"pith_short_12","alias_value":"4AQUNY57W5BM","created_at":"2026-05-18T12:32:05.422762+00:00"},{"alias_kind":"pith_short_16","alias_value":"4AQUNY57W5BMQIMV","created_at":"2026-05-18T12:32:05.422762+00:00"},{"alias_kind":"pith_short_8","alias_value":"4AQUNY57","created_at":"2026-05-18T12:32:05.422762+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3","json":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3.json","graph_json":"https://pith.science/api/pith-number/4AQUNY57W5BMQIMV2KVMCUX4K3/graph.json","events_json":"https://pith.science/api/pith-number/4AQUNY57W5BMQIMV2KVMCUX4K3/events.json","paper":"https://pith.science/paper/4AQUNY57"},"agent_actions":{"view_html":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3","download_json":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3.json","view_paper":"https://pith.science/paper/4AQUNY57","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1802.02411&json=true","fetch_graph":"https://pith.science/api/pith-number/4AQUNY57W5BMQIMV2KVMCUX4K3/graph.json","fetch_events":"https://pith.science/api/pith-number/4AQUNY57W5BMQIMV2KVMCUX4K3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3/action/storage_attestation","attest_author":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3/action/author_attestation","sign_citation":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3/action/citation_signature","submit_replication":"https://pith.science/pith/4AQUNY57W5BMQIMV2KVMCUX4K3/action/replication_record"}},"created_at":"2026-05-18T00:24:03.643958+00:00","updated_at":"2026-05-18T00:24:03.643958+00:00"}