{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:HQBS6R7VYCPC62ON5AE23N3WW4","short_pith_number":"pith:HQBS6R7V","canonical_record":{"source":{"id":"1904.03887","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-04-08T08:34:33Z","cross_cats_sorted":[],"title_canon_sha256":"31f2bc4952825ced1d13c8a38c9c8f13381a47e5bd0b610a8f86caee79b4230d","abstract_canon_sha256":"992c3712c30ca392a98a9a5f8ab0272f9aa3ae43dc3f14d925b753f1de387fd3"},"schema_version":"1.0"},"canonical_sha256":"3c032f47f5c09e2f69cde809adb776b719d4431fb900ef6cc551b6cab3f5cf40","source":{"kind":"arxiv","id":"1904.03887","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.03887","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"arxiv_version","alias_value":"1904.03887v3","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.03887","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"pith_short_12","alias_value":"HQBS6R7VYCPC","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"HQBS6R7VYCPC62ON","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"HQBS6R7V","created_at":"2026-07-05T00:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:HQBS6R7VYCPC62ON5AE23N3WW4","target":"record","payload":{"canonical_record":{"source":{"id":"1904.03887","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-04-08T08:34:33Z","cross_cats_sorted":[],"title_canon_sha256":"31f2bc4952825ced1d13c8a38c9c8f13381a47e5bd0b610a8f86caee79b4230d","abstract_canon_sha256":"992c3712c30ca392a98a9a5f8ab0272f9aa3ae43dc3f14d925b753f1de387fd3"},"schema_version":"1.0"},"canonical_sha256":"3c032f47f5c09e2f69cde809adb776b719d4431fb900ef6cc551b6cab3f5cf40","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:30:04.269050Z","signature_b64":"GyvLM7/ZXDWLm4Mg93WNDHliKXrRGOUCA3MiJTBzGE4+m0QjYam+IYBXOc8MNAP/RDg6MhL0IXRKynqf8/u0BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c032f47f5c09e2f69cde809adb776b719d4431fb900ef6cc551b6cab3f5cf40","last_reissued_at":"2026-07-05T00:30:04.268668Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:30:04.268668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.03887","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:30:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"90fqSdLepVxsE6nppZndsE6bTT5cdUkubq/85AvLOM840fxUhsg9D+bIv84d0bBWDyOJg0+luKUi3ojbfQtNAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T04:20:12.283035Z"},"content_sha256":"3a2da46d86d1fda7f24b97360b590e4ee99deb62dcad94af933bd08a35a97fcb","schema_version":"1.0","event_id":"sha256:3a2da46d86d1fda7f24b97360b590e4ee99deb62dcad94af933bd08a35a97fcb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:HQBS6R7VYCPC62ON5AE23N3WW4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-flavor chiral perturbation theory at nonzero isospin: Pion condensation at zero temperature","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Jens O. Andersen, Patrick Kneschke, Prabal Adhikari","submitted_at":"2019-04-08T08:34:33Z","abstract_excerpt":"In this paper, we calculate the equation of state of two-flavor finite isospin chiral perturbation theory at next-to-leading order in the pion-condensed phase at zero temperature. We show that the transition from the vacuum phase to a Bose-condensed phase is of second order. While the tree-level result has been known for some time, surprisingly quantum effects have not yet been incorporated into the equation of state. We find that the corrections to the quantities we compute, namely the isospin density, pressure, and equation of state, increase with increasing isospin chemical potential. We co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.03887","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1904.03887/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:30:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jjtmysneGyrIpxeGaEajzUZkMamlZ+9Ni/odwfUUJ1cjZBRlouymh4D3a0aNd2vuZIx0EHVDKfJRf3QKaNGXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T04:20:12.283580Z"},"content_sha256":"b935b90fa62810fb912037a3b628e2888896458d200d8a40a50fa0ed37f6fa68","schema_version":"1.0","event_id":"sha256:b935b90fa62810fb912037a3b628e2888896458d200d8a40a50fa0ed37f6fa68"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HQBS6R7VYCPC62ON5AE23N3WW4/bundle.json","state_url":"https://pith.science/pith/HQBS6R7VYCPC62ON5AE23N3WW4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HQBS6R7VYCPC62ON5AE23N3WW4/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":"2026-08-12T04:20:12Z","links":{"resolver":"https://pith.science/pith/HQBS6R7VYCPC62ON5AE23N3WW4","bundle":"https://pith.science/pith/HQBS6R7VYCPC62ON5AE23N3WW4/bundle.json","state":"https://pith.science/pith/HQBS6R7VYCPC62ON5AE23N3WW4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HQBS6R7VYCPC62ON5AE23N3WW4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:HQBS6R7VYCPC62ON5AE23N3WW4","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":"992c3712c30ca392a98a9a5f8ab0272f9aa3ae43dc3f14d925b753f1de387fd3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-04-08T08:34:33Z","title_canon_sha256":"31f2bc4952825ced1d13c8a38c9c8f13381a47e5bd0b610a8f86caee79b4230d"},"schema_version":"1.0","source":{"id":"1904.03887","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.03887","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"arxiv_version","alias_value":"1904.03887v3","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.03887","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"pith_short_12","alias_value":"HQBS6R7VYCPC","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"HQBS6R7VYCPC62ON","created_at":"2026-07-05T00:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"HQBS6R7V","created_at":"2026-07-05T00:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:b935b90fa62810fb912037a3b628e2888896458d200d8a40a50fa0ed37f6fa68","target":"graph","created_at":"2026-07-05T00:30:04Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1904.03887/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we calculate the equation of state of two-flavor finite isospin chiral perturbation theory at next-to-leading order in the pion-condensed phase at zero temperature. We show that the transition from the vacuum phase to a Bose-condensed phase is of second order. While the tree-level result has been known for some time, surprisingly quantum effects have not yet been incorporated into the equation of state. We find that the corrections to the quantities we compute, namely the isospin density, pressure, and equation of state, increase with increasing isospin chemical potential. We co","authors_text":"Jens O. Andersen, Patrick Kneschke, Prabal Adhikari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-04-08T08:34:33Z","title":"Two-flavor chiral perturbation theory at nonzero isospin: Pion condensation at zero temperature"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.03887","kind":"arxiv","version":3},"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":"sha256:3a2da46d86d1fda7f24b97360b590e4ee99deb62dcad94af933bd08a35a97fcb","target":"record","created_at":"2026-07-05T00:30:04Z","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":"992c3712c30ca392a98a9a5f8ab0272f9aa3ae43dc3f14d925b753f1de387fd3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2019-04-08T08:34:33Z","title_canon_sha256":"31f2bc4952825ced1d13c8a38c9c8f13381a47e5bd0b610a8f86caee79b4230d"},"schema_version":"1.0","source":{"id":"1904.03887","kind":"arxiv","version":3}},"canonical_sha256":"3c032f47f5c09e2f69cde809adb776b719d4431fb900ef6cc551b6cab3f5cf40","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c032f47f5c09e2f69cde809adb776b719d4431fb900ef6cc551b6cab3f5cf40","first_computed_at":"2026-07-05T00:30:04.268668Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:30:04.268668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GyvLM7/ZXDWLm4Mg93WNDHliKXrRGOUCA3MiJTBzGE4+m0QjYam+IYBXOc8MNAP/RDg6MhL0IXRKynqf8/u0BA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:30:04.269050Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.03887","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a2da46d86d1fda7f24b97360b590e4ee99deb62dcad94af933bd08a35a97fcb","sha256:b935b90fa62810fb912037a3b628e2888896458d200d8a40a50fa0ed37f6fa68"],"state_sha256":"296f99597a8f21e595855974a9cd7e37b623bcfcea6420edbeed38a09220c1d7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O/v90hFESo5j+lsqk6ddfb8zzG7dnfHFo4ZffLo9W3oHGuP5Zql8nfrmInXNqSmlhc5Q77XApfkn1vTzvZZWAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T04:20:12.288740Z","bundle_sha256":"e7efb7e626762f6b15db2f8960a621fe54283d37ce870fb014fd2eae3fb83d46"}}