{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:7DO3AIIHRIJ5KR6MREV27FD6ZE","short_pith_number":"pith:7DO3AIIH","canonical_record":{"source":{"id":"1903.05731","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-03-13T21:43:54Z","cross_cats_sorted":[],"title_canon_sha256":"b9996484e003f942c22cfb7d856aa3f57cd5a91bb83a0942e82ab3c34f753ec0","abstract_canon_sha256":"acc0d7aa142f50229fa978040e431ac1ff2cc01cc851e20e34a7e89e838e3b77"},"schema_version":"1.0"},"canonical_sha256":"f8ddb021078a13d547cc892baf947ec9111f721fd9a06002a865f340c385eb7e","source":{"kind":"arxiv","id":"1903.05731","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.05731","created_at":"2026-05-17T23:51:16Z"},{"alias_kind":"arxiv_version","alias_value":"1903.05731v1","created_at":"2026-05-17T23:51:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.05731","created_at":"2026-05-17T23:51:16Z"},{"alias_kind":"pith_short_12","alias_value":"7DO3AIIHRIJ5","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"7DO3AIIHRIJ5KR6M","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"7DO3AIIH","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:7DO3AIIHRIJ5KR6MREV27FD6ZE","target":"record","payload":{"canonical_record":{"source":{"id":"1903.05731","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-03-13T21:43:54Z","cross_cats_sorted":[],"title_canon_sha256":"b9996484e003f942c22cfb7d856aa3f57cd5a91bb83a0942e82ab3c34f753ec0","abstract_canon_sha256":"acc0d7aa142f50229fa978040e431ac1ff2cc01cc851e20e34a7e89e838e3b77"},"schema_version":"1.0"},"canonical_sha256":"f8ddb021078a13d547cc892baf947ec9111f721fd9a06002a865f340c385eb7e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:16.394499Z","signature_b64":"lgipRhlewexJr8KBjrgu2//JJtisDDkU86gnFcNhewmd5GM5b8ZYodATxZ1n84rHPIwkXGZatyZLLCg81UsWDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f8ddb021078a13d547cc892baf947ec9111f721fd9a06002a865f340c385eb7e","last_reissued_at":"2026-05-17T23:51:16.394085Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:16.394085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.05731","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":"2026-05-17T23:51:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hWMFT3CmEFjtYsuQ54HWHQw94MGoZMzbD8fxDIFxNw5D8wmHYXkRWM46ISeT72r1wHLOF/bKqH9nM1emf4FsBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T07:24:56.457991Z"},"content_sha256":"b517afebdf3622aab09df61c897e84429c5ef6159800d54fa1084244db442d03","schema_version":"1.0","event_id":"sha256:b517afebdf3622aab09df61c897e84429c5ef6159800d54fa1084244db442d03"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:7DO3AIIHRIJ5KR6MREV27FD6ZE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hydrodynamic Phonon Transport: Past, Present, and Prospect","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Sangyeop Lee, Xun Li","submitted_at":"2019-03-13T21:43:54Z","abstract_excerpt":"The hydrodynamic phonon transport was studied several decades ago for verifying the quantum theory of lattice thermal transport. Recent prediction of significant hydrodynamic phonon transport in graphitic materials shows its practical importance for high thermal conductivity materials and brought a renewed attention. As the study on this topic has been inactive to some extent for several decades, we aim at providing a brief overview of the past studies as well as very recent studies. The topics we discuss in this chapter include the collective motion of phonons, several approaches to solve the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.05731","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":"2026-05-17T23:51:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5+KaBsLQVCV70fU4558+2+qr3fk+gHjn+hpiiIwm+Le0QfiJqdEk/4aurYBwU7GCnu6+AhmrIqjI2aYyBErjCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T07:24:56.458337Z"},"content_sha256":"2ca5c8f89e3fd2fee763e361fa850a0cb63d6fb596cba74e615bf6fb4ba18ff0","schema_version":"1.0","event_id":"sha256:2ca5c8f89e3fd2fee763e361fa850a0cb63d6fb596cba74e615bf6fb4ba18ff0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7DO3AIIHRIJ5KR6MREV27FD6ZE/bundle.json","state_url":"https://pith.science/pith/7DO3AIIHRIJ5KR6MREV27FD6ZE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7DO3AIIHRIJ5KR6MREV27FD6ZE/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":"2026-06-28T07:24:56Z","links":{"resolver":"https://pith.science/pith/7DO3AIIHRIJ5KR6MREV27FD6ZE","bundle":"https://pith.science/pith/7DO3AIIHRIJ5KR6MREV27FD6ZE/bundle.json","state":"https://pith.science/pith/7DO3AIIHRIJ5KR6MREV27FD6ZE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7DO3AIIHRIJ5KR6MREV27FD6ZE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:7DO3AIIHRIJ5KR6MREV27FD6ZE","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":"acc0d7aa142f50229fa978040e431ac1ff2cc01cc851e20e34a7e89e838e3b77","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-03-13T21:43:54Z","title_canon_sha256":"b9996484e003f942c22cfb7d856aa3f57cd5a91bb83a0942e82ab3c34f753ec0"},"schema_version":"1.0","source":{"id":"1903.05731","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.05731","created_at":"2026-05-17T23:51:16Z"},{"alias_kind":"arxiv_version","alias_value":"1903.05731v1","created_at":"2026-05-17T23:51:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.05731","created_at":"2026-05-17T23:51:16Z"},{"alias_kind":"pith_short_12","alias_value":"7DO3AIIHRIJ5","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"7DO3AIIHRIJ5KR6M","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"7DO3AIIH","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:2ca5c8f89e3fd2fee763e361fa850a0cb63d6fb596cba74e615bf6fb4ba18ff0","target":"graph","created_at":"2026-05-17T23:51:16Z","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 hydrodynamic phonon transport was studied several decades ago for verifying the quantum theory of lattice thermal transport. Recent prediction of significant hydrodynamic phonon transport in graphitic materials shows its practical importance for high thermal conductivity materials and brought a renewed attention. As the study on this topic has been inactive to some extent for several decades, we aim at providing a brief overview of the past studies as well as very recent studies. The topics we discuss in this chapter include the collective motion of phonons, several approaches to solve the","authors_text":"Sangyeop Lee, Xun Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-03-13T21:43:54Z","title":"Hydrodynamic Phonon Transport: Past, Present, and Prospect"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.05731","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:b517afebdf3622aab09df61c897e84429c5ef6159800d54fa1084244db442d03","target":"record","created_at":"2026-05-17T23:51:16Z","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":"acc0d7aa142f50229fa978040e431ac1ff2cc01cc851e20e34a7e89e838e3b77","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-03-13T21:43:54Z","title_canon_sha256":"b9996484e003f942c22cfb7d856aa3f57cd5a91bb83a0942e82ab3c34f753ec0"},"schema_version":"1.0","source":{"id":"1903.05731","kind":"arxiv","version":1}},"canonical_sha256":"f8ddb021078a13d547cc892baf947ec9111f721fd9a06002a865f340c385eb7e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f8ddb021078a13d547cc892baf947ec9111f721fd9a06002a865f340c385eb7e","first_computed_at":"2026-05-17T23:51:16.394085Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:16.394085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lgipRhlewexJr8KBjrgu2//JJtisDDkU86gnFcNhewmd5GM5b8ZYodATxZ1n84rHPIwkXGZatyZLLCg81UsWDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:16.394499Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.05731","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b517afebdf3622aab09df61c897e84429c5ef6159800d54fa1084244db442d03","sha256:2ca5c8f89e3fd2fee763e361fa850a0cb63d6fb596cba74e615bf6fb4ba18ff0"],"state_sha256":"c15c8b000f0d690418d442d81b393e1a5a995efc5b8d3aabcad2aae65301beb0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tois2mncmG+8WzKi/WqxBHJa13lhjaeD2HMFzwY7x1lzSzz951v18qs+FVYx4+b0MMA7NDOyR9n5xcRiqdueDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T07:24:56.460064Z","bundle_sha256":"8aeb004c54a8448dbeed27dc0614234270d799ff4064bbd68d54664f29fca761"}}