{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:TRM6567DWWLMGEN6Z7WDNNC7J4","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":"e9861df23c417d1d5ade24001c3581d90bf047fbc6766af75eba8d520e20e757","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2011-09-29T15:03:26Z","title_canon_sha256":"338dfd47aa320b3b79daeb9a1dfb2441ec7c4147d6131a3d9f08d27b942fc6e1"},"schema_version":"1.0","source":{"id":"1109.6549","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.6549","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"1109.6549v1","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.6549","created_at":"2026-05-18T04:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"TRM6567DWWLM","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"TRM6567DWWLMGEN6","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"TRM6567D","created_at":"2026-05-18T12:26:42Z"}],"graph_snapshots":[{"event_id":"sha256:3f0e93ab8d86de2f764ba10ba71ba991cdef8b7119f17718c7d5689acbe33dfa","target":"graph","created_at":"2026-05-18T04:12:01Z","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 planar Quantum ElectroDynamics (QED) with two degenerate staggered fermions in an external magnetic field on the lattice. Our preliminary results indicate that in external magnetic fields there is dynamical generation of mass for two-dimensional massless Dirac fermions in the weak coupling region. We comment on possible implications to the quantum Hall effect in graphene.","authors_text":"Alessandro Papa, Leonardo Cosmai, Paolo Cea, Pietro Giudice","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2011-09-29T15:03:26Z","title":"Lattice Planar QED in external magnetic field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.6549","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:df0c50b7078aee6c8888e4e1a6197bf34d93e5744d80adbef12bf391912eec3d","target":"record","created_at":"2026-05-18T04:12:01Z","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":"e9861df23c417d1d5ade24001c3581d90bf047fbc6766af75eba8d520e20e757","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2011-09-29T15:03:26Z","title_canon_sha256":"338dfd47aa320b3b79daeb9a1dfb2441ec7c4147d6131a3d9f08d27b942fc6e1"},"schema_version":"1.0","source":{"id":"1109.6549","kind":"arxiv","version":1}},"canonical_sha256":"9c59eefbe3b596c311becfec36b45f4f28fb6eb1f849284b4965cf9215f01850","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9c59eefbe3b596c311becfec36b45f4f28fb6eb1f849284b4965cf9215f01850","first_computed_at":"2026-05-18T04:12:01.348811Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:01.348811Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U9rt9plth0MiTN2Gl0mZovLStWygd+Q4KErkGR0ZRAL0A4HfmwJJ4U9vKG4073WaswMoUXNr31Oz1B1Gix9oDw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:01.349377Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.6549","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df0c50b7078aee6c8888e4e1a6197bf34d93e5744d80adbef12bf391912eec3d","sha256:3f0e93ab8d86de2f764ba10ba71ba991cdef8b7119f17718c7d5689acbe33dfa"],"state_sha256":"e280dadec195a89fe9f1ab77224c71ec0858c5cc77fe7d5c49d14950283afa54"}