{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:SN5HFTAQK6FKMTXJWVSYCIINBU","short_pith_number":"pith:SN5HFTAQ","canonical_record":{"source":{"id":"1510.01982","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-10-07T15:07:40Z","cross_cats_sorted":["astro-ph.SR","cond-mat.quant-gas"],"title_canon_sha256":"52e280fbc7976dc0389766af6c2c7cdc23a3d1d6ce78ed004991003e947792a6","abstract_canon_sha256":"e56a2d60e46716fec5bfbd2e00393e689d5c5c81f2cf146acc37a3cdb4c9f930"},"schema_version":"1.0"},"canonical_sha256":"937a72cc10578aa64ee9b56581210d0d1cbae88dc06a211b9bd3c5594968e4e5","source":{"kind":"arxiv","id":"1510.01982","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.01982","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"1510.01982v2","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.01982","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"SN5HFTAQK6FK","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SN5HFTAQK6FKMTXJ","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SN5HFTAQ","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:SN5HFTAQK6FKMTXJWVSYCIINBU","target":"record","payload":{"canonical_record":{"source":{"id":"1510.01982","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-10-07T15:07:40Z","cross_cats_sorted":["astro-ph.SR","cond-mat.quant-gas"],"title_canon_sha256":"52e280fbc7976dc0389766af6c2c7cdc23a3d1d6ce78ed004991003e947792a6","abstract_canon_sha256":"e56a2d60e46716fec5bfbd2e00393e689d5c5c81f2cf146acc37a3cdb4c9f930"},"schema_version":"1.0"},"canonical_sha256":"937a72cc10578aa64ee9b56581210d0d1cbae88dc06a211b9bd3c5594968e4e5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:05.954745Z","signature_b64":"NgOGbkfQoW3/iWlf/Bou49YPj4tWqIPpGch5bSnApqs9wc+CECkYw3/0m7IiyQEEJ46iQR9PgZJSEkc4jaTKDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"937a72cc10578aa64ee9b56581210d0d1cbae88dc06a211b9bd3c5594968e4e5","last_reissued_at":"2026-05-18T01:22:05.954192Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:05.954192Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.01982","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":"2026-05-18T01:22:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xOVPzEHssiFVsHamcE1jRz0qxTeQKOukpeaIrFLwN748tksA16oYprk24w3AIogoPGLnmxctWy25L8+n+oLKCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T13:37:46.564364Z"},"content_sha256":"58c549e29b8d509b3a558b081b053b8867bf43c800e78d1aa78bc25b2c49dda3","schema_version":"1.0","event_id":"sha256:58c549e29b8d509b3a558b081b053b8867bf43c800e78d1aa78bc25b2c49dda3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:SN5HFTAQK6FKMTXJWVSYCIINBU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Instabilities in relativistic two-component (super)fluids","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR","cond-mat.quant-gas"],"primary_cat":"hep-ph","authors_text":"Alexander Haber, Andreas Schmitt, Stephan Stetina","submitted_at":"2015-10-07T15:07:40Z","abstract_excerpt":"We study two-fluid systems with nonzero fluid velocities and compute their sound modes, which indicate various instabilities. For the case of two zero-temperature superfluids we employ a microscopic field-theoretical model of two coupled bosonic fields, including an entrainment coupling and a non-entrainment coupling. We analyse the onset of the various instabilities systematically and point out that the dynamical two-stream instability can only occur beyond Landau's critical velocity, i.e., in an already energetically unstable regime. A qualitative difference is found for the case of two norm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.01982","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":"2026-05-18T01:22:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l24q0GS0oNhxd2PNwLyNbZdfZpDMX27TMPGKjo9i/5vgU3/PHH7IQPMXKPKZksno+KW8LS+ZZT5YfIcBw+1WAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T13:37:46.565122Z"},"content_sha256":"8cfc973e8852b996cb4325ef2f97323e33a6457f2af8b8d0c3272e9013b31198","schema_version":"1.0","event_id":"sha256:8cfc973e8852b996cb4325ef2f97323e33a6457f2af8b8d0c3272e9013b31198"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SN5HFTAQK6FKMTXJWVSYCIINBU/bundle.json","state_url":"https://pith.science/pith/SN5HFTAQK6FKMTXJWVSYCIINBU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SN5HFTAQK6FKMTXJWVSYCIINBU/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":"2026-05-31T13:37:46Z","links":{"resolver":"https://pith.science/pith/SN5HFTAQK6FKMTXJWVSYCIINBU","bundle":"https://pith.science/pith/SN5HFTAQK6FKMTXJWVSYCIINBU/bundle.json","state":"https://pith.science/pith/SN5HFTAQK6FKMTXJWVSYCIINBU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SN5HFTAQK6FKMTXJWVSYCIINBU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:SN5HFTAQK6FKMTXJWVSYCIINBU","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":"e56a2d60e46716fec5bfbd2e00393e689d5c5c81f2cf146acc37a3cdb4c9f930","cross_cats_sorted":["astro-ph.SR","cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-10-07T15:07:40Z","title_canon_sha256":"52e280fbc7976dc0389766af6c2c7cdc23a3d1d6ce78ed004991003e947792a6"},"schema_version":"1.0","source":{"id":"1510.01982","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.01982","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"1510.01982v2","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.01982","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"SN5HFTAQK6FK","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SN5HFTAQK6FKMTXJ","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SN5HFTAQ","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:8cfc973e8852b996cb4325ef2f97323e33a6457f2af8b8d0c3272e9013b31198","target":"graph","created_at":"2026-05-18T01:22:05Z","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 study two-fluid systems with nonzero fluid velocities and compute their sound modes, which indicate various instabilities. For the case of two zero-temperature superfluids we employ a microscopic field-theoretical model of two coupled bosonic fields, including an entrainment coupling and a non-entrainment coupling. We analyse the onset of the various instabilities systematically and point out that the dynamical two-stream instability can only occur beyond Landau's critical velocity, i.e., in an already energetically unstable regime. A qualitative difference is found for the case of two norm","authors_text":"Alexander Haber, Andreas Schmitt, Stephan Stetina","cross_cats":["astro-ph.SR","cond-mat.quant-gas"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-10-07T15:07:40Z","title":"Instabilities in relativistic two-component (super)fluids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.01982","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":"sha256:58c549e29b8d509b3a558b081b053b8867bf43c800e78d1aa78bc25b2c49dda3","target":"record","created_at":"2026-05-18T01:22:05Z","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":"e56a2d60e46716fec5bfbd2e00393e689d5c5c81f2cf146acc37a3cdb4c9f930","cross_cats_sorted":["astro-ph.SR","cond-mat.quant-gas"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-10-07T15:07:40Z","title_canon_sha256":"52e280fbc7976dc0389766af6c2c7cdc23a3d1d6ce78ed004991003e947792a6"},"schema_version":"1.0","source":{"id":"1510.01982","kind":"arxiv","version":2}},"canonical_sha256":"937a72cc10578aa64ee9b56581210d0d1cbae88dc06a211b9bd3c5594968e4e5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"937a72cc10578aa64ee9b56581210d0d1cbae88dc06a211b9bd3c5594968e4e5","first_computed_at":"2026-05-18T01:22:05.954192Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:05.954192Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NgOGbkfQoW3/iWlf/Bou49YPj4tWqIPpGch5bSnApqs9wc+CECkYw3/0m7IiyQEEJ46iQR9PgZJSEkc4jaTKDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:05.954745Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.01982","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58c549e29b8d509b3a558b081b053b8867bf43c800e78d1aa78bc25b2c49dda3","sha256:8cfc973e8852b996cb4325ef2f97323e33a6457f2af8b8d0c3272e9013b31198"],"state_sha256":"e5a9c59527ac5b1bf2759ee67dbdf3d2890e43ab4f4a3812fd4ffe31fde59754"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yLFGczXDD8Dbf04a82My/qq6jcpJvwL2Cfpoc+1EIGsU+4cZMQJ+uNvz3PoU2ePGgLYALD7NksDA9S+ROyRtBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T13:37:46.569129Z","bundle_sha256":"1c883ede1fc0c606e199e0a08bfcaad7fdaaba74e7ce96bd6ec15a09bae10a86"}}