{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:RKADWINLOKLVVUF5SISZDWCEG5","short_pith_number":"pith:RKADWINL","canonical_record":{"source":{"id":"1510.08863","kind":"arxiv","version":8},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-29T20:04:58Z","cross_cats_sorted":[],"title_canon_sha256":"75cdc159a75e45c555592f0e98c5b5d06e776de20fb1734e043a7e8675bd3b7e","abstract_canon_sha256":"da6fb5afad9ddca11b0af210a48e093b214022dab703ae9b60adaf833dbc2adc"},"schema_version":"1.0"},"canonical_sha256":"8a803b21ab72975ad0bd922591d844374b4a6c815618d6bcc3fff5c8521b3070","source":{"kind":"arxiv","id":"1510.08863","version":8},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.08863","created_at":"2026-05-18T00:45:35Z"},{"alias_kind":"arxiv_version","alias_value":"1510.08863v8","created_at":"2026-05-18T00:45:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.08863","created_at":"2026-05-18T00:45:35Z"},{"alias_kind":"pith_short_12","alias_value":"RKADWINLOKLV","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RKADWINLOKLVVUF5","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RKADWINL","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:RKADWINLOKLVVUF5SISZDWCEG5","target":"record","payload":{"canonical_record":{"source":{"id":"1510.08863","kind":"arxiv","version":8},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-29T20:04:58Z","cross_cats_sorted":[],"title_canon_sha256":"75cdc159a75e45c555592f0e98c5b5d06e776de20fb1734e043a7e8675bd3b7e","abstract_canon_sha256":"da6fb5afad9ddca11b0af210a48e093b214022dab703ae9b60adaf833dbc2adc"},"schema_version":"1.0"},"canonical_sha256":"8a803b21ab72975ad0bd922591d844374b4a6c815618d6bcc3fff5c8521b3070","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:45:35.183265Z","signature_b64":"IteTqmkaNdWJ5eaVTXUvEQsY5w2GRDj+p2gECsVwttdQmAMfIUiNiXcp6WWdMM4KwgtsAWexegjBwJMhAnyKDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8a803b21ab72975ad0bd922591d844374b4a6c815618d6bcc3fff5c8521b3070","last_reissued_at":"2026-05-18T00:45:35.182611Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:45:35.182611Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.08863","source_version":8,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:45:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uggFfbkr/lCtYzlYIHiMuGwLPj1A9JzF+bA4cR/Z8uKO1ijAMRS9pQDjHDW6i7c6qiDfa8r7WjK9IZ1oDIO7Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T20:05:25.115852Z"},"content_sha256":"4c33fead7eff885fff2059307f484f851ca985ada46ba5262c3dadc5ff428e8d","schema_version":"1.0","event_id":"sha256:4c33fead7eff885fff2059307f484f851ca985ada46ba5262c3dadc5ff428e8d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:RKADWINLOKLVVUF5SISZDWCEG5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fundamental Limits of Repeaterless Quantum Communications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Carlo Ottaviani, Leonardo Banchi, Riccardo Laurenza, Stefano Pirandola","submitted_at":"2015-10-29T20:04:58Z","abstract_excerpt":"Quantum communications promises reliable transmission of quantum information, efficient distribution of entanglement and generation of completely secure keys. For all these tasks, we need to determine the optimal point-to-point rates that are achievable by two remote parties at the ends of a quantum channel, without restrictions on their local operations and classical communication, which can be unlimited and two-way. These two-way assisted capacities represent the ultimate rates that are reachable without quantum repeaters. By constructing an upperbound based on the relative entropy of entang"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08863","kind":"arxiv","version":8},"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":"2026-05-18T00:45:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7LrAD3GKMXrMwWJEzP2/BJ9//hnjJYkj1335CrUpjnJSmkaqirsfvVuArNH4Nj/5M1uUALQn6C1fkKTZS8vADg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T20:05:25.116442Z"},"content_sha256":"d44409c25832fcee21dcd4976cc5e3d61a9c143bad5c6dd60180097fb590086b","schema_version":"1.0","event_id":"sha256:d44409c25832fcee21dcd4976cc5e3d61a9c143bad5c6dd60180097fb590086b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RKADWINLOKLVVUF5SISZDWCEG5/bundle.json","state_url":"https://pith.science/pith/RKADWINLOKLVVUF5SISZDWCEG5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RKADWINLOKLVVUF5SISZDWCEG5/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":"2026-06-05T20:05:25Z","links":{"resolver":"https://pith.science/pith/RKADWINLOKLVVUF5SISZDWCEG5","bundle":"https://pith.science/pith/RKADWINLOKLVVUF5SISZDWCEG5/bundle.json","state":"https://pith.science/pith/RKADWINLOKLVVUF5SISZDWCEG5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RKADWINLOKLVVUF5SISZDWCEG5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:RKADWINLOKLVVUF5SISZDWCEG5","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":"da6fb5afad9ddca11b0af210a48e093b214022dab703ae9b60adaf833dbc2adc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-29T20:04:58Z","title_canon_sha256":"75cdc159a75e45c555592f0e98c5b5d06e776de20fb1734e043a7e8675bd3b7e"},"schema_version":"1.0","source":{"id":"1510.08863","kind":"arxiv","version":8}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.08863","created_at":"2026-05-18T00:45:35Z"},{"alias_kind":"arxiv_version","alias_value":"1510.08863v8","created_at":"2026-05-18T00:45:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.08863","created_at":"2026-05-18T00:45:35Z"},{"alias_kind":"pith_short_12","alias_value":"RKADWINLOKLV","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RKADWINLOKLVVUF5","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RKADWINL","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:d44409c25832fcee21dcd4976cc5e3d61a9c143bad5c6dd60180097fb590086b","target":"graph","created_at":"2026-05-18T00:45:35Z","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":"Quantum communications promises reliable transmission of quantum information, efficient distribution of entanglement and generation of completely secure keys. For all these tasks, we need to determine the optimal point-to-point rates that are achievable by two remote parties at the ends of a quantum channel, without restrictions on their local operations and classical communication, which can be unlimited and two-way. These two-way assisted capacities represent the ultimate rates that are reachable without quantum repeaters. By constructing an upperbound based on the relative entropy of entang","authors_text":"Carlo Ottaviani, Leonardo Banchi, Riccardo Laurenza, Stefano Pirandola","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-29T20:04:58Z","title":"Fundamental Limits of Repeaterless Quantum Communications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08863","kind":"arxiv","version":8},"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":"sha256:4c33fead7eff885fff2059307f484f851ca985ada46ba5262c3dadc5ff428e8d","target":"record","created_at":"2026-05-18T00:45:35Z","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":"da6fb5afad9ddca11b0af210a48e093b214022dab703ae9b60adaf833dbc2adc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-10-29T20:04:58Z","title_canon_sha256":"75cdc159a75e45c555592f0e98c5b5d06e776de20fb1734e043a7e8675bd3b7e"},"schema_version":"1.0","source":{"id":"1510.08863","kind":"arxiv","version":8}},"canonical_sha256":"8a803b21ab72975ad0bd922591d844374b4a6c815618d6bcc3fff5c8521b3070","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a803b21ab72975ad0bd922591d844374b4a6c815618d6bcc3fff5c8521b3070","first_computed_at":"2026-05-18T00:45:35.182611Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:35.182611Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IteTqmkaNdWJ5eaVTXUvEQsY5w2GRDj+p2gECsVwttdQmAMfIUiNiXcp6WWdMM4KwgtsAWexegjBwJMhAnyKDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:35.183265Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.08863","source_kind":"arxiv","source_version":8}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4c33fead7eff885fff2059307f484f851ca985ada46ba5262c3dadc5ff428e8d","sha256:d44409c25832fcee21dcd4976cc5e3d61a9c143bad5c6dd60180097fb590086b"],"state_sha256":"c36498feba432ca4a97e43837057bf0d3f4eec5b2f4adae45d1bf98de8b974d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C6WYbZUxYaJlsWuUd4JT6BlkUGgWKqgg5pC9TsiiMquKbyEwA0jykgJj3WnHSo31n145jLanuLvN+Ay7+UhsCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T20:05:25.120581Z","bundle_sha256":"a6877a9d2b74bd67c725f33cfb776a3a5a4ceaf6d004d5905ec648c0e580aa56"}}