{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:XHBSMBFAIRQMB5EBR4ZBWAGRKV","short_pith_number":"pith:XHBSMBFA","canonical_record":{"source":{"id":"1212.4410","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-12-18T16:22:20Z","cross_cats_sorted":["cond-mat.other","nucl-th"],"title_canon_sha256":"e986bb4e4d51b090d7cd63f6b19546d41e35b075faed174a08860695034b2864","abstract_canon_sha256":"7f243ef973592feb53eef6888e6cdbc4a4b924cb443caf1a745bbd0fa90040b7"},"schema_version":"1.0"},"canonical_sha256":"b9c32604a04460c0f4818f321b00d15568a4d939dfacc35c4707f42d49c35a20","source":{"kind":"arxiv","id":"1212.4410","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.4410","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"arxiv_version","alias_value":"1212.4410v1","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.4410","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"pith_short_12","alias_value":"XHBSMBFAIRQM","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XHBSMBFAIRQMB5EB","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XHBSMBFA","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:XHBSMBFAIRQMB5EBR4ZBWAGRKV","target":"record","payload":{"canonical_record":{"source":{"id":"1212.4410","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-12-18T16:22:20Z","cross_cats_sorted":["cond-mat.other","nucl-th"],"title_canon_sha256":"e986bb4e4d51b090d7cd63f6b19546d41e35b075faed174a08860695034b2864","abstract_canon_sha256":"7f243ef973592feb53eef6888e6cdbc4a4b924cb443caf1a745bbd0fa90040b7"},"schema_version":"1.0"},"canonical_sha256":"b9c32604a04460c0f4818f321b00d15568a4d939dfacc35c4707f42d49c35a20","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:38:13.095288Z","signature_b64":"9zkKjvpviy4Z3YEYjmi9KIMzhKjxxo6W0y9XCL04B20lIeUDXPx9nfaGE8a3ejid+/FBjlnhP/DF779ISZeEAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b9c32604a04460c0f4818f321b00d15568a4d939dfacc35c4707f42d49c35a20","last_reissued_at":"2026-05-18T03:38:13.094853Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:38:13.094853Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.4410","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":"2026-05-18T03:38:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U4kVhxHIL0xVS+OaRwU+PXqzD9Xgp5ibrIjqqtaB2eSNVBDKrMt0S7QmVT5P7zgW4cb094+kVHcALv+cQwM3Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:27:16.871115Z"},"content_sha256":"d01995762c68b168a0755103297ba447b1fd03e5a1973e2efccee247f7626b85","schema_version":"1.0","event_id":"sha256:d01995762c68b168a0755103297ba447b1fd03e5a1973e2efccee247f7626b85"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:XHBSMBFAIRQMB5EBR4ZBWAGRKV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Relativistic superfluid hydrodynamics from field theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other","nucl-th"],"primary_cat":"hep-ph","authors_text":"Andreas Schmitt, Mark G. Alford, S. Kumar Mallavarapu, Stephan Stetina","submitted_at":"2012-12-18T16:22:20Z","abstract_excerpt":"It is well known that the hydrodynamics of a zero-temperature superfluid can be formulated in field-theoretic terms, relating for example the superfluid four-velocity to the gradient of the phase of a Bose-condensed scalar field. At nonzero temperatures, where the phenomenology of a superfluid is usually described within a two-fluid picture, this relationship is less obvious. For the case of a uniform, dissipationless superfluid at small temperatures and weak coupling we discuss this relationship within a phi^4 model. For instance, we compute the entrainment coefficient, which describes the in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.4410","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":"2026-05-18T03:38:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kBIUS7BFSRygCKi0Lz7mbOHUVQ3dtHieqJ6ZH3ahp+pZejNe6ybtT/NBXlPQhKMJk2JWEDrWNeSOksdxd5DsCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:27:16.871542Z"},"content_sha256":"cbde5312e3491a37d3818bf2e0aa9ca15a299c3407dbcc57c4e2310608b0c13e","schema_version":"1.0","event_id":"sha256:cbde5312e3491a37d3818bf2e0aa9ca15a299c3407dbcc57c4e2310608b0c13e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XHBSMBFAIRQMB5EBR4ZBWAGRKV/bundle.json","state_url":"https://pith.science/pith/XHBSMBFAIRQMB5EBR4ZBWAGRKV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XHBSMBFAIRQMB5EBR4ZBWAGRKV/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":"2026-05-31T10:27:16Z","links":{"resolver":"https://pith.science/pith/XHBSMBFAIRQMB5EBR4ZBWAGRKV","bundle":"https://pith.science/pith/XHBSMBFAIRQMB5EBR4ZBWAGRKV/bundle.json","state":"https://pith.science/pith/XHBSMBFAIRQMB5EBR4ZBWAGRKV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XHBSMBFAIRQMB5EBR4ZBWAGRKV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:XHBSMBFAIRQMB5EBR4ZBWAGRKV","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":"7f243ef973592feb53eef6888e6cdbc4a4b924cb443caf1a745bbd0fa90040b7","cross_cats_sorted":["cond-mat.other","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-12-18T16:22:20Z","title_canon_sha256":"e986bb4e4d51b090d7cd63f6b19546d41e35b075faed174a08860695034b2864"},"schema_version":"1.0","source":{"id":"1212.4410","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.4410","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"arxiv_version","alias_value":"1212.4410v1","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.4410","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"pith_short_12","alias_value":"XHBSMBFAIRQM","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XHBSMBFAIRQMB5EB","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XHBSMBFA","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:cbde5312e3491a37d3818bf2e0aa9ca15a299c3407dbcc57c4e2310608b0c13e","target":"graph","created_at":"2026-05-18T03:38:13Z","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":"It is well known that the hydrodynamics of a zero-temperature superfluid can be formulated in field-theoretic terms, relating for example the superfluid four-velocity to the gradient of the phase of a Bose-condensed scalar field. At nonzero temperatures, where the phenomenology of a superfluid is usually described within a two-fluid picture, this relationship is less obvious. For the case of a uniform, dissipationless superfluid at small temperatures and weak coupling we discuss this relationship within a phi^4 model. For instance, we compute the entrainment coefficient, which describes the in","authors_text":"Andreas Schmitt, Mark G. Alford, S. Kumar Mallavarapu, Stephan Stetina","cross_cats":["cond-mat.other","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-12-18T16:22:20Z","title":"Relativistic superfluid hydrodynamics from field theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.4410","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:d01995762c68b168a0755103297ba447b1fd03e5a1973e2efccee247f7626b85","target":"record","created_at":"2026-05-18T03:38:13Z","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":"7f243ef973592feb53eef6888e6cdbc4a4b924cb443caf1a745bbd0fa90040b7","cross_cats_sorted":["cond-mat.other","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2012-12-18T16:22:20Z","title_canon_sha256":"e986bb4e4d51b090d7cd63f6b19546d41e35b075faed174a08860695034b2864"},"schema_version":"1.0","source":{"id":"1212.4410","kind":"arxiv","version":1}},"canonical_sha256":"b9c32604a04460c0f4818f321b00d15568a4d939dfacc35c4707f42d49c35a20","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b9c32604a04460c0f4818f321b00d15568a4d939dfacc35c4707f42d49c35a20","first_computed_at":"2026-05-18T03:38:13.094853Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:13.094853Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9zkKjvpviy4Z3YEYjmi9KIMzhKjxxo6W0y9XCL04B20lIeUDXPx9nfaGE8a3ejid+/FBjlnhP/DF779ISZeEAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:13.095288Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.4410","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d01995762c68b168a0755103297ba447b1fd03e5a1973e2efccee247f7626b85","sha256:cbde5312e3491a37d3818bf2e0aa9ca15a299c3407dbcc57c4e2310608b0c13e"],"state_sha256":"7133beab5d3c551e73e44bbe44184ae34c9f650cfed233ea714c842a20b2c6d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LC5VHoqZrHoHEzIg0lG7VkvvgSGU6E+Dzp2JmXkvDSC0ybbLRfNWhcGLDftGKbwbJIiwDhDe9NyVqVfrtnBgDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:27:16.873982Z","bundle_sha256":"97a75d3582ac7b78f1c09da8265a65c1da5e7067133882c4f6771ee943931fb4"}}