{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:THQAEHAMECR6AUUJIXK3SHZFQN","short_pith_number":"pith:THQAEHAM","canonical_record":{"source":{"id":"1511.04842","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-11-16T06:40:50Z","cross_cats_sorted":[],"title_canon_sha256":"5e94b173f7605982bf338c4d253bcc860c41ed7d8ff0a6ba951a28d7071dae00","abstract_canon_sha256":"7df238c4a8c71c1b7e8979fcdcd515ec72ac0be5d3c1f32a6fef3eaf242f47a1"},"schema_version":"1.0"},"canonical_sha256":"99e0021c0c20a3e0528945d5b91f25835ae38b1f22ac5aac3dbecf22634c8b79","source":{"kind":"arxiv","id":"1511.04842","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.04842","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"1511.04842v1","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.04842","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"THQAEHAMECR6","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"THQAEHAMECR6AUUJ","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"THQAEHAM","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:THQAEHAMECR6AUUJIXK3SHZFQN","target":"record","payload":{"canonical_record":{"source":{"id":"1511.04842","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-11-16T06:40:50Z","cross_cats_sorted":[],"title_canon_sha256":"5e94b173f7605982bf338c4d253bcc860c41ed7d8ff0a6ba951a28d7071dae00","abstract_canon_sha256":"7df238c4a8c71c1b7e8979fcdcd515ec72ac0be5d3c1f32a6fef3eaf242f47a1"},"schema_version":"1.0"},"canonical_sha256":"99e0021c0c20a3e0528945d5b91f25835ae38b1f22ac5aac3dbecf22634c8b79","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:20:33.187687Z","signature_b64":"/5YNawrkimPwiPKzHUsKHRkZf7qiScRq8zXfocgP+ZA2mDEiRrn7MMOiBpXpOYUh12zOvD2ecihDv64TXmHUAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99e0021c0c20a3e0528945d5b91f25835ae38b1f22ac5aac3dbecf22634c8b79","last_reissued_at":"2026-05-18T01:20:33.187173Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:20:33.187173Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.04842","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":"2026-05-18T01:20:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Us9uFxxDfR3t10c2HpyR0ciSXRwRdkM4VrYJQ1R4vusOnm+kqZeSiCXknfSjr3YQfGBpPxMHvV2VtwXoisObBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:00:44.924849Z"},"content_sha256":"261192980a60b50f361b2b7d04dafe6ce3945a06d978edcf4911a66e9ebfc4cd","schema_version":"1.0","event_id":"sha256:261192980a60b50f361b2b7d04dafe6ce3945a06d978edcf4911a66e9ebfc4cd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:THQAEHAMECR6AUUJIXK3SHZFQN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Lattice simulation of $QC_2D$ with $N_f=2$ at non-zero baryon density","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"A. A. Nikolaev, A. Yu. Kotov, S. N. Valgushev, V. V. Braguta","submitted_at":"2015-11-16T06:40:50Z","abstract_excerpt":"The lattice simulations of $QC_2D$ with two flavors of staggered fermions and non-zero quark chemical potential $\\mu_q$ have been performed. Dependencies of the Polyakov loop, chiral condensate and baryon number density on $\\mu_q$ were studied. We found that an increase of the baryon chemical potential leads to chiral symmetry restoration. At small values of $\\mu_q$, our results for the baryon number density agree with ChPT predictions."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.04842","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":"2026-05-18T01:20:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VcAehkygNvnTyLNJAukQ9hW1wQbv0EKgJjg9DRI9QulSyU3PPhMQ2AYrESndoP0XRzIgC65w3qxjHX/KivvTDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:00:44.925183Z"},"content_sha256":"2773744979a03a801074c41ea7ff10d89301e7d731becc35fa006a713184835b","schema_version":"1.0","event_id":"sha256:2773744979a03a801074c41ea7ff10d89301e7d731becc35fa006a713184835b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/THQAEHAMECR6AUUJIXK3SHZFQN/bundle.json","state_url":"https://pith.science/pith/THQAEHAMECR6AUUJIXK3SHZFQN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/THQAEHAMECR6AUUJIXK3SHZFQN/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":"2026-05-30T07:00:44Z","links":{"resolver":"https://pith.science/pith/THQAEHAMECR6AUUJIXK3SHZFQN","bundle":"https://pith.science/pith/THQAEHAMECR6AUUJIXK3SHZFQN/bundle.json","state":"https://pith.science/pith/THQAEHAMECR6AUUJIXK3SHZFQN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/THQAEHAMECR6AUUJIXK3SHZFQN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:THQAEHAMECR6AUUJIXK3SHZFQN","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":"7df238c4a8c71c1b7e8979fcdcd515ec72ac0be5d3c1f32a6fef3eaf242f47a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-11-16T06:40:50Z","title_canon_sha256":"5e94b173f7605982bf338c4d253bcc860c41ed7d8ff0a6ba951a28d7071dae00"},"schema_version":"1.0","source":{"id":"1511.04842","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.04842","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"1511.04842v1","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.04842","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"THQAEHAMECR6","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"THQAEHAMECR6AUUJ","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"THQAEHAM","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:2773744979a03a801074c41ea7ff10d89301e7d731becc35fa006a713184835b","target":"graph","created_at":"2026-05-18T01:20:33Z","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":"The lattice simulations of $QC_2D$ with two flavors of staggered fermions and non-zero quark chemical potential $\\mu_q$ have been performed. Dependencies of the Polyakov loop, chiral condensate and baryon number density on $\\mu_q$ were studied. We found that an increase of the baryon chemical potential leads to chiral symmetry restoration. At small values of $\\mu_q$, our results for the baryon number density agree with ChPT predictions.","authors_text":"A. A. Nikolaev, A. Yu. Kotov, S. N. Valgushev, V. V. Braguta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-11-16T06:40:50Z","title":"Lattice simulation of $QC_2D$ with $N_f=2$ at non-zero baryon density"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.04842","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":"sha256:261192980a60b50f361b2b7d04dafe6ce3945a06d978edcf4911a66e9ebfc4cd","target":"record","created_at":"2026-05-18T01:20:33Z","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":"7df238c4a8c71c1b7e8979fcdcd515ec72ac0be5d3c1f32a6fef3eaf242f47a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2015-11-16T06:40:50Z","title_canon_sha256":"5e94b173f7605982bf338c4d253bcc860c41ed7d8ff0a6ba951a28d7071dae00"},"schema_version":"1.0","source":{"id":"1511.04842","kind":"arxiv","version":1}},"canonical_sha256":"99e0021c0c20a3e0528945d5b91f25835ae38b1f22ac5aac3dbecf22634c8b79","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99e0021c0c20a3e0528945d5b91f25835ae38b1f22ac5aac3dbecf22634c8b79","first_computed_at":"2026-05-18T01:20:33.187173Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:33.187173Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/5YNawrkimPwiPKzHUsKHRkZf7qiScRq8zXfocgP+ZA2mDEiRrn7MMOiBpXpOYUh12zOvD2ecihDv64TXmHUAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:33.187687Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.04842","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:261192980a60b50f361b2b7d04dafe6ce3945a06d978edcf4911a66e9ebfc4cd","sha256:2773744979a03a801074c41ea7ff10d89301e7d731becc35fa006a713184835b"],"state_sha256":"b7189d2610f336270b997d9678c38751480f80ca90c68e07a160fe52346a67a3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zOzt0yZW3/rLk+noZCagPXWeoKHpnzVXT8Uq2+zOQXJGvtc8mGzXXER8+UUphFubb7V/PuDsTkTeDSFP4TZYAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T07:00:44.927068Z","bundle_sha256":"9a6fc453a528d5c37a3b5f12ccbf9ce9c510acfee567f833271864cadf251432"}}