{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:CSJFCQ7654SEM6E3MAJ3JA23IL","short_pith_number":"pith:CSJFCQ76","canonical_record":{"source":{"id":"1407.7572","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-07-28T21:06:43Z","cross_cats_sorted":[],"title_canon_sha256":"b3cb36db4203a1acb5b3389976970433cfce5701e3ea2a3c1438d9f2be654d75","abstract_canon_sha256":"6e122743c8378902ba88f155181ef5fe726f27b6841de5519c06aa13f0d165aa"},"schema_version":"1.0"},"canonical_sha256":"14925143feef2446789b6013b4835b42f534aacbce0dcdef5dbb429639f7230a","source":{"kind":"arxiv","id":"1407.7572","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.7572","created_at":"2026-05-18T01:42:29Z"},{"alias_kind":"arxiv_version","alias_value":"1407.7572v2","created_at":"2026-05-18T01:42:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.7572","created_at":"2026-05-18T01:42:29Z"},{"alias_kind":"pith_short_12","alias_value":"CSJFCQ7654SE","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"CSJFCQ7654SEM6E3","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"CSJFCQ76","created_at":"2026-05-18T12:28:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:CSJFCQ7654SEM6E3MAJ3JA23IL","target":"record","payload":{"canonical_record":{"source":{"id":"1407.7572","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-07-28T21:06:43Z","cross_cats_sorted":[],"title_canon_sha256":"b3cb36db4203a1acb5b3389976970433cfce5701e3ea2a3c1438d9f2be654d75","abstract_canon_sha256":"6e122743c8378902ba88f155181ef5fe726f27b6841de5519c06aa13f0d165aa"},"schema_version":"1.0"},"canonical_sha256":"14925143feef2446789b6013b4835b42f534aacbce0dcdef5dbb429639f7230a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:29.087170Z","signature_b64":"ROzIPIAopZiWB00vL0rlnhz1k3tSmEKHnEb5YwfOpBcqWhxXaZcVd3DGD3BOYxoCXYykDJ9GN0NLXOOnMD1RDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"14925143feef2446789b6013b4835b42f534aacbce0dcdef5dbb429639f7230a","last_reissued_at":"2026-05-18T01:42:29.086532Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:29.086532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.7572","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":"2026-05-18T01:42:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3hbCP5/GUdjQK1uhwcTl/HoE9mpvrVfbXj0NMi6BB7ttQA/pbHhDEIqjIyr8Soe6S5jWS1V27xhSfQUMozGvCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T03:39:29.312477Z"},"content_sha256":"2d00c8fecbc5f59e32ecc65d07af23c06c97b99e72ed4671e16911a8a6b158cc","schema_version":"1.0","event_id":"sha256:2d00c8fecbc5f59e32ecc65d07af23c06c97b99e72ed4671e16911a8a6b158cc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:CSJFCQ7654SEM6E3MAJ3JA23IL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Shear viscosity and imperfect fluidity in bosonic and fermionic superfluids","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Hao Guo, K. Levin, Rufus Boyack","submitted_at":"2014-07-28T21:06:43Z","abstract_excerpt":"In this paper we address the ratio of the shear viscosity to entropy density $\\eta/s$ in bosonic and fermionic superfluids. A small $\\eta/s$ is associated with nearly perfect fluidity, and more general measures of the fluidity perfection/imperfection are of wide interest to a number of communities. We use a Kubo approach to concretely address this ratio via low temperature transport associated with the quasi-particles. Our analysis for bosonic superfluids utilizes the framework of the one-loop Bogoliubov approximation, whereas for fermionic superfluids we apply BCS theory and its BCS-BEC exten"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.7572","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":"2026-05-18T01:42:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vuvdZ0oWoMBMRVofFOX9HcCptxrpgsHld/rlSflo6p+vDRJ2udGfSkKkK9DRe69EauctR9Z1zZEVdxMo4UVgDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T03:39:29.313156Z"},"content_sha256":"1944c2af564cc9d8982f3ad8094ccacc077feb3cd21048fe7fbedbb4f675253b","schema_version":"1.0","event_id":"sha256:1944c2af564cc9d8982f3ad8094ccacc077feb3cd21048fe7fbedbb4f675253b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CSJFCQ7654SEM6E3MAJ3JA23IL/bundle.json","state_url":"https://pith.science/pith/CSJFCQ7654SEM6E3MAJ3JA23IL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CSJFCQ7654SEM6E3MAJ3JA23IL/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":"2026-06-09T03:39:29Z","links":{"resolver":"https://pith.science/pith/CSJFCQ7654SEM6E3MAJ3JA23IL","bundle":"https://pith.science/pith/CSJFCQ7654SEM6E3MAJ3JA23IL/bundle.json","state":"https://pith.science/pith/CSJFCQ7654SEM6E3MAJ3JA23IL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CSJFCQ7654SEM6E3MAJ3JA23IL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:CSJFCQ7654SEM6E3MAJ3JA23IL","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":"6e122743c8378902ba88f155181ef5fe726f27b6841de5519c06aa13f0d165aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-07-28T21:06:43Z","title_canon_sha256":"b3cb36db4203a1acb5b3389976970433cfce5701e3ea2a3c1438d9f2be654d75"},"schema_version":"1.0","source":{"id":"1407.7572","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.7572","created_at":"2026-05-18T01:42:29Z"},{"alias_kind":"arxiv_version","alias_value":"1407.7572v2","created_at":"2026-05-18T01:42:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.7572","created_at":"2026-05-18T01:42:29Z"},{"alias_kind":"pith_short_12","alias_value":"CSJFCQ7654SE","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"CSJFCQ7654SEM6E3","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"CSJFCQ76","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:1944c2af564cc9d8982f3ad8094ccacc077feb3cd21048fe7fbedbb4f675253b","target":"graph","created_at":"2026-05-18T01:42:29Z","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":"In this paper we address the ratio of the shear viscosity to entropy density $\\eta/s$ in bosonic and fermionic superfluids. A small $\\eta/s$ is associated with nearly perfect fluidity, and more general measures of the fluidity perfection/imperfection are of wide interest to a number of communities. We use a Kubo approach to concretely address this ratio via low temperature transport associated with the quasi-particles. Our analysis for bosonic superfluids utilizes the framework of the one-loop Bogoliubov approximation, whereas for fermionic superfluids we apply BCS theory and its BCS-BEC exten","authors_text":"Hao Guo, K. Levin, Rufus Boyack","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-07-28T21:06:43Z","title":"Shear viscosity and imperfect fluidity in bosonic and fermionic superfluids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.7572","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":"sha256:2d00c8fecbc5f59e32ecc65d07af23c06c97b99e72ed4671e16911a8a6b158cc","target":"record","created_at":"2026-05-18T01:42:29Z","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":"6e122743c8378902ba88f155181ef5fe726f27b6841de5519c06aa13f0d165aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-07-28T21:06:43Z","title_canon_sha256":"b3cb36db4203a1acb5b3389976970433cfce5701e3ea2a3c1438d9f2be654d75"},"schema_version":"1.0","source":{"id":"1407.7572","kind":"arxiv","version":2}},"canonical_sha256":"14925143feef2446789b6013b4835b42f534aacbce0dcdef5dbb429639f7230a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"14925143feef2446789b6013b4835b42f534aacbce0dcdef5dbb429639f7230a","first_computed_at":"2026-05-18T01:42:29.086532Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:29.086532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ROzIPIAopZiWB00vL0rlnhz1k3tSmEKHnEb5YwfOpBcqWhxXaZcVd3DGD3BOYxoCXYykDJ9GN0NLXOOnMD1RDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:29.087170Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.7572","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2d00c8fecbc5f59e32ecc65d07af23c06c97b99e72ed4671e16911a8a6b158cc","sha256:1944c2af564cc9d8982f3ad8094ccacc077feb3cd21048fe7fbedbb4f675253b"],"state_sha256":"35ae4f33d6419c7682e448c9039331c5ab27bac42577f119c3c5ce87e47beddf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JFaUTdE2boHE7T0shXLP0gn4E0nvXtVwHYTAuBAPM9DVa7J4gSCeimd7PXO6cdBWfMOfmmRQb//Ncw5qWM9PCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T03:39:29.317037Z","bundle_sha256":"1b0147faaf195e3210a132baafc226ec10a601bab61e9f193a1ea8f42d66b51b"}}