{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:DSWXNDKLUQRPV7ZNF55LSJEIQ6","short_pith_number":"pith:DSWXNDKL","canonical_record":{"source":{"id":"1812.04833","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-12-12T07:28:33Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"de4c7d211dfaa864ce47d61e894eca874bbf4c685062657d40d5446b5f050cd3","abstract_canon_sha256":"bd26ea96342320c29c93b845911c25825566bdeb4f0e9fbf42d45063bd00b812"},"schema_version":"1.0"},"canonical_sha256":"1cad768d4ba422faff2d2f7ab9248887817560ea19be9bd7fc08a7c1acba7703","source":{"kind":"arxiv","id":"1812.04833","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.04833","created_at":"2026-05-17T23:52:15Z"},{"alias_kind":"arxiv_version","alias_value":"1812.04833v2","created_at":"2026-05-17T23:52:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.04833","created_at":"2026-05-17T23:52:15Z"},{"alias_kind":"pith_short_12","alias_value":"DSWXNDKLUQRP","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"DSWXNDKLUQRPV7ZN","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"DSWXNDKL","created_at":"2026-05-18T12:32:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:DSWXNDKLUQRPV7ZNF55LSJEIQ6","target":"record","payload":{"canonical_record":{"source":{"id":"1812.04833","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-12-12T07:28:33Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"de4c7d211dfaa864ce47d61e894eca874bbf4c685062657d40d5446b5f050cd3","abstract_canon_sha256":"bd26ea96342320c29c93b845911c25825566bdeb4f0e9fbf42d45063bd00b812"},"schema_version":"1.0"},"canonical_sha256":"1cad768d4ba422faff2d2f7ab9248887817560ea19be9bd7fc08a7c1acba7703","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:15.124054Z","signature_b64":"9qjMChJKg2nRoTN/dxsCgDOVsfC3r1sMv4N58OBx4YuLl3NK2V7ITmBzLXqPmMUVDRSfnBPZkMHYO+V48MvsAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1cad768d4ba422faff2d2f7ab9248887817560ea19be9bd7fc08a7c1acba7703","last_reissued_at":"2026-05-17T23:52:15.123413Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:15.123413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.04833","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:52:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0WuTBnlmF3YBIbhf/8c6XJh489qMk2BmmLHFXWiZLEABlCgdOetZfINPbSv8Gc6GRn9y2ujXzlytVeymSvh/AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T12:50:15.505690Z"},"content_sha256":"50b32dc06f773b49641dca83cf3ed22aa0d6b28621495e39cd34a0ee21762877","schema_version":"1.0","event_id":"sha256:50b32dc06f773b49641dca83cf3ed22aa0d6b28621495e39cd34a0ee21762877"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:DSWXNDKLUQRPV7ZNF55LSJEIQ6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Attractive polaron in a Dirac system within the ladder approximation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.str-el","authors_text":"Chen-Huan Wu","submitted_at":"2018-12-12T07:28:33Z","abstract_excerpt":"We investigate the properties of the attractive polaron formed by a single impurity dressed with the particle-hole excitations in a Dirac system at zero-temperature limit. Base on the single particle-hole variational ansatz, we deduce the expressions of the pair propagator, self-energy (negative), and the non-self-consistent medium $T$-matrix. Different to the self-consistent $T$-matrix which contains two channels due to the many-body effect, the non-self-consistent $T$-matrix discussed in this paper contains only the closed channel (i.e., the bare one) since we consider only a finite number o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.04833","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:52:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5H654xqqZq/9FLlBJQX9vMKlUolV+wqVRqdGAlI0AZvVQ83PhSgNK1+OVDDXSvi6CGbbSDeKaA0GPn+K8PAdCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T12:50:15.506040Z"},"content_sha256":"15f6645a92a1c98a2acbe0318bf8153585bf123d99c6144cb966f5f33cec3232","schema_version":"1.0","event_id":"sha256:15f6645a92a1c98a2acbe0318bf8153585bf123d99c6144cb966f5f33cec3232"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DSWXNDKLUQRPV7ZNF55LSJEIQ6/bundle.json","state_url":"https://pith.science/pith/DSWXNDKLUQRPV7ZNF55LSJEIQ6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DSWXNDKLUQRPV7ZNF55LSJEIQ6/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":"2026-06-27T12:50:15Z","links":{"resolver":"https://pith.science/pith/DSWXNDKLUQRPV7ZNF55LSJEIQ6","bundle":"https://pith.science/pith/DSWXNDKLUQRPV7ZNF55LSJEIQ6/bundle.json","state":"https://pith.science/pith/DSWXNDKLUQRPV7ZNF55LSJEIQ6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DSWXNDKLUQRPV7ZNF55LSJEIQ6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:DSWXNDKLUQRPV7ZNF55LSJEIQ6","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":"bd26ea96342320c29c93b845911c25825566bdeb4f0e9fbf42d45063bd00b812","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-12-12T07:28:33Z","title_canon_sha256":"de4c7d211dfaa864ce47d61e894eca874bbf4c685062657d40d5446b5f050cd3"},"schema_version":"1.0","source":{"id":"1812.04833","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.04833","created_at":"2026-05-17T23:52:15Z"},{"alias_kind":"arxiv_version","alias_value":"1812.04833v2","created_at":"2026-05-17T23:52:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.04833","created_at":"2026-05-17T23:52:15Z"},{"alias_kind":"pith_short_12","alias_value":"DSWXNDKLUQRP","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"DSWXNDKLUQRPV7ZN","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"DSWXNDKL","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:15f6645a92a1c98a2acbe0318bf8153585bf123d99c6144cb966f5f33cec3232","target":"graph","created_at":"2026-05-17T23:52:15Z","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 investigate the properties of the attractive polaron formed by a single impurity dressed with the particle-hole excitations in a Dirac system at zero-temperature limit. Base on the single particle-hole variational ansatz, we deduce the expressions of the pair propagator, self-energy (negative), and the non-self-consistent medium $T$-matrix. Different to the self-consistent $T$-matrix which contains two channels due to the many-body effect, the non-self-consistent $T$-matrix discussed in this paper contains only the closed channel (i.e., the bare one) since we consider only a finite number o","authors_text":"Chen-Huan Wu","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-12-12T07:28:33Z","title":"Attractive polaron in a Dirac system within the ladder approximation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.04833","kind":"arxiv","version":2},"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":"sha256:50b32dc06f773b49641dca83cf3ed22aa0d6b28621495e39cd34a0ee21762877","target":"record","created_at":"2026-05-17T23:52:15Z","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":"bd26ea96342320c29c93b845911c25825566bdeb4f0e9fbf42d45063bd00b812","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-12-12T07:28:33Z","title_canon_sha256":"de4c7d211dfaa864ce47d61e894eca874bbf4c685062657d40d5446b5f050cd3"},"schema_version":"1.0","source":{"id":"1812.04833","kind":"arxiv","version":2}},"canonical_sha256":"1cad768d4ba422faff2d2f7ab9248887817560ea19be9bd7fc08a7c1acba7703","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1cad768d4ba422faff2d2f7ab9248887817560ea19be9bd7fc08a7c1acba7703","first_computed_at":"2026-05-17T23:52:15.123413Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:15.123413Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9qjMChJKg2nRoTN/dxsCgDOVsfC3r1sMv4N58OBx4YuLl3NK2V7ITmBzLXqPmMUVDRSfnBPZkMHYO+V48MvsAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:15.124054Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.04833","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:50b32dc06f773b49641dca83cf3ed22aa0d6b28621495e39cd34a0ee21762877","sha256:15f6645a92a1c98a2acbe0318bf8153585bf123d99c6144cb966f5f33cec3232"],"state_sha256":"d5c5343d330cd281bb0698a3525b5b405d7540fe26f4810728f5f08a57dfd275"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P7zauVmvywpl8SaGjcPoOX025iSZ4I9PdrsTNL/omXXlq8QDvwBzy7CAbh44v1A4CdaWAR5glg+i0EVqjnBxDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T12:50:15.507887Z","bundle_sha256":"50c8e44f4ee6982664fa9f3127a43d94a713a4c83f5e6bb1be99e4d6c30e54b9"}}