{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:LGA3STSPZESVUKAG52AKAURWM5","short_pith_number":"pith:LGA3STSP","canonical_record":{"source":{"id":"1707.05219","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-07-17T15:17:17Z","cross_cats_sorted":[],"title_canon_sha256":"d72aef8fd48da91597188053cf80571726de7d7e87fdc7c0b69aa4afba63fb3b","abstract_canon_sha256":"97f31a35413cb1c8ff80bd54cd18902101863823a2d40a27fc20a8e20fcf9ab9"},"schema_version":"1.0"},"canonical_sha256":"5981b94e4fc9255a2806ee80a05236674a13d02be64a07dc169364ffb262a96a","source":{"kind":"arxiv","id":"1707.05219","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.05219","created_at":"2026-05-18T00:25:17Z"},{"alias_kind":"arxiv_version","alias_value":"1707.05219v1","created_at":"2026-05-18T00:25:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.05219","created_at":"2026-05-18T00:25:17Z"},{"alias_kind":"pith_short_12","alias_value":"LGA3STSPZESV","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LGA3STSPZESVUKAG","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LGA3STSP","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:LGA3STSPZESVUKAG52AKAURWM5","target":"record","payload":{"canonical_record":{"source":{"id":"1707.05219","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-07-17T15:17:17Z","cross_cats_sorted":[],"title_canon_sha256":"d72aef8fd48da91597188053cf80571726de7d7e87fdc7c0b69aa4afba63fb3b","abstract_canon_sha256":"97f31a35413cb1c8ff80bd54cd18902101863823a2d40a27fc20a8e20fcf9ab9"},"schema_version":"1.0"},"canonical_sha256":"5981b94e4fc9255a2806ee80a05236674a13d02be64a07dc169364ffb262a96a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:25:17.991584Z","signature_b64":"0YnxMfvV1YpYJxBNfN0S6cNaVihFplrjZvzZblgcVUQHTDcwijY0JhwY57rKTWUVUKW/WPrr4WBu41GGJpgkAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5981b94e4fc9255a2806ee80a05236674a13d02be64a07dc169364ffb262a96a","last_reissued_at":"2026-05-18T00:25:17.990863Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:25:17.990863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.05219","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:25:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lJ5BXKvQyFE5KZuNBpzzMlRQG8gVwBu3ykTvjPbOFCaQI7t/Q3PkjVOUbBOlgoBnZabq9VmNkKasDffY1Zs5BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T14:12:31.511038Z"},"content_sha256":"53d3b213df48e459d9a60d648143469ba1c030993690fda69d3ad56bc05cf726","schema_version":"1.0","event_id":"sha256:53d3b213df48e459d9a60d648143469ba1c030993690fda69d3ad56bc05cf726"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:LGA3STSPZESVUKAG52AKAURWM5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ab initio calculation of spin fluctuation spectra using time dependent density functional perturbation theory, planewaves, and pseudopotentials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Feliciano Giustino, Henry Lambert, Kun Cao, Paolo G. Radaelli","submitted_at":"2017-07-17T15:17:17Z","abstract_excerpt":"We present an implementation of time-dependent density functional perturbation theory for spin fluctuations, based on planewaves and pseudopotentials. We compute the dynamic spin susceptibility self-consistently by solving the time-dependent Sternheimer equation, within the adiabatic local density approximation to the exchange and correlation kernel. We demonstrate our implementation by calculating the spin susceptibility of representative elemental transition metals, namely bcc Fe, fcc Ni and bcc Cr. The calculated magnon dispersion relations of Fe and Ni are in agreement with previous work. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.05219","kind":"arxiv","version":1},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:25:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LFyojnCHUMlmN9Uiim5fs15VMJ/9B7ASYcanXMT8p+TwlAdpUi18bwgqD/6b82U8fEFTfLP6jKSWPcWrsJw9AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T14:12:31.511716Z"},"content_sha256":"aeed8535d4d08f7ceb2f7c818e0ea65d881997640b9db4069d901df6f59876b8","schema_version":"1.0","event_id":"sha256:aeed8535d4d08f7ceb2f7c818e0ea65d881997640b9db4069d901df6f59876b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LGA3STSPZESVUKAG52AKAURWM5/bundle.json","state_url":"https://pith.science/pith/LGA3STSPZESVUKAG52AKAURWM5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LGA3STSPZESVUKAG52AKAURWM5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-21T14:12:31Z","links":{"resolver":"https://pith.science/pith/LGA3STSPZESVUKAG52AKAURWM5","bundle":"https://pith.science/pith/LGA3STSPZESVUKAG52AKAURWM5/bundle.json","state":"https://pith.science/pith/LGA3STSPZESVUKAG52AKAURWM5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LGA3STSPZESVUKAG52AKAURWM5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:LGA3STSPZESVUKAG52AKAURWM5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"97f31a35413cb1c8ff80bd54cd18902101863823a2d40a27fc20a8e20fcf9ab9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-07-17T15:17:17Z","title_canon_sha256":"d72aef8fd48da91597188053cf80571726de7d7e87fdc7c0b69aa4afba63fb3b"},"schema_version":"1.0","source":{"id":"1707.05219","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.05219","created_at":"2026-05-18T00:25:17Z"},{"alias_kind":"arxiv_version","alias_value":"1707.05219v1","created_at":"2026-05-18T00:25:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.05219","created_at":"2026-05-18T00:25:17Z"},{"alias_kind":"pith_short_12","alias_value":"LGA3STSPZESV","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LGA3STSPZESVUKAG","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LGA3STSP","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:aeed8535d4d08f7ceb2f7c818e0ea65d881997640b9db4069d901df6f59876b8","target":"graph","created_at":"2026-05-18T00:25:17Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We present an implementation of time-dependent density functional perturbation theory for spin fluctuations, based on planewaves and pseudopotentials. We compute the dynamic spin susceptibility self-consistently by solving the time-dependent Sternheimer equation, within the adiabatic local density approximation to the exchange and correlation kernel. We demonstrate our implementation by calculating the spin susceptibility of representative elemental transition metals, namely bcc Fe, fcc Ni and bcc Cr. The calculated magnon dispersion relations of Fe and Ni are in agreement with previous work. ","authors_text":"Feliciano Giustino, Henry Lambert, Kun Cao, Paolo G. Radaelli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-07-17T15:17:17Z","title":"Ab initio calculation of spin fluctuation spectra using time dependent density functional perturbation theory, planewaves, and pseudopotentials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.05219","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:53d3b213df48e459d9a60d648143469ba1c030993690fda69d3ad56bc05cf726","target":"record","created_at":"2026-05-18T00:25:17Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"97f31a35413cb1c8ff80bd54cd18902101863823a2d40a27fc20a8e20fcf9ab9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-07-17T15:17:17Z","title_canon_sha256":"d72aef8fd48da91597188053cf80571726de7d7e87fdc7c0b69aa4afba63fb3b"},"schema_version":"1.0","source":{"id":"1707.05219","kind":"arxiv","version":1}},"canonical_sha256":"5981b94e4fc9255a2806ee80a05236674a13d02be64a07dc169364ffb262a96a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5981b94e4fc9255a2806ee80a05236674a13d02be64a07dc169364ffb262a96a","first_computed_at":"2026-05-18T00:25:17.990863Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:25:17.990863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0YnxMfvV1YpYJxBNfN0S6cNaVihFplrjZvzZblgcVUQHTDcwijY0JhwY57rKTWUVUKW/WPrr4WBu41GGJpgkAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:25:17.991584Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.05219","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:53d3b213df48e459d9a60d648143469ba1c030993690fda69d3ad56bc05cf726","sha256:aeed8535d4d08f7ceb2f7c818e0ea65d881997640b9db4069d901df6f59876b8"],"state_sha256":"d6eda4b036ec8482b06a07485b7c5cbaaf01d8035a83fdbb96d26cf901131b65"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Ujb7NrLvKwIt2IWH51Dpf9A+a7DRXRU4B7U2fcbaCew5sv5rv4/OmupJEBft+7SJr/ydXYlAiEE8D5YID7YDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T14:12:31.513924Z","bundle_sha256":"ff99284bd7724a6e413fde6f4051464aa2c8a6306885ebda80f73a1f82c5625e"}}