{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:5HSIV27VDMA37IG3BQCFX6K4LY","short_pith_number":"pith:5HSIV27V","canonical_record":{"source":{"id":"quant-ph/0506039","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2005-06-05T19:10:59Z","cross_cats_sorted":[],"title_canon_sha256":"3699d3da2f9fbcc0c43788ea3f08ddb4b1aacdaf316316837a22471ac72ed88e","abstract_canon_sha256":"f34b29476800098cfba577c20f8bb593a308bc99c9058a24c6cc70691058a0c8"},"schema_version":"1.0"},"canonical_sha256":"e9e48aebf51b01bfa0db0c045bf95c5e1af4f5cf9429da22526329fba53e60d2","source":{"kind":"arxiv","id":"quant-ph/0506039","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0506039","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0506039v1","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0506039","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"pith_short_12","alias_value":"5HSIV27VDMA3","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"5HSIV27VDMA37IG3","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"5HSIV27V","created_at":"2026-05-18T12:25:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:5HSIV27VDMA37IG3BQCFX6K4LY","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/0506039","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2005-06-05T19:10:59Z","cross_cats_sorted":[],"title_canon_sha256":"3699d3da2f9fbcc0c43788ea3f08ddb4b1aacdaf316316837a22471ac72ed88e","abstract_canon_sha256":"f34b29476800098cfba577c20f8bb593a308bc99c9058a24c6cc70691058a0c8"},"schema_version":"1.0"},"canonical_sha256":"e9e48aebf51b01bfa0db0c045bf95c5e1af4f5cf9429da22526329fba53e60d2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:06.830185Z","signature_b64":"s/VWsd4ThqlTx0pElncIbplBtq9eEg/FrUmdb/ukg4ohjWuv3uLJ3xxjJsf06fMMyvVHumbnftovIxlokoDlAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e9e48aebf51b01bfa0db0c045bf95c5e1af4f5cf9429da22526329fba53e60d2","last_reissued_at":"2026-05-18T02:35:06.829795Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:06.829795Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/0506039","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":"2026-05-18T02:35:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R4gaeTkXXTlqX0D0dpGLc5HQHbGdbnWUDdP6CAm07VmtWGRL0GYnICwSSVivczMwjemLAC4LHZmkGgD6AmztCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:42:31.515713Z"},"content_sha256":"6838863b18b43f20879a576a1e8190cd3872dea39eaff0e12a800699faa1a843","schema_version":"1.0","event_id":"sha256:6838863b18b43f20879a576a1e8190cd3872dea39eaff0e12a800699faa1a843"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:5HSIV27VDMA37IG3BQCFX6K4LY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-way quantum communication channels","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Andrew M. Childs, Debbie W. Leung, Hoi-Kwong Lo","submitted_at":"2005-06-05T19:10:59Z","abstract_excerpt":"We consider communication between two parties using a bipartite quantum operation, which constitutes the most general quantum mechanical model of two-party communication. We primarily focus on the simultaneous forward and backward communication of classical messages. For the case in which the two parties share unlimited prior entanglement, we give inner and outer bounds on the achievable rate region that generalize classical results due to Shannon. In particular, using a protocol of Bennett, Harrow, Leung, and Smolin, we give a one-shot expression in terms of the Holevo information for the ent"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0506039","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":"2026-05-18T02:35:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EiKTXCuPiQzWxhFibiYuUV3GB/FUZgfBxZNpX6xtuXcMthBeQxE9zWzebnwC6wcU5x+Qx/SlU+s1/rUhfIgaAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:42:31.516056Z"},"content_sha256":"96b4851ace85d4ac7b2b22520d908459ea7482b4a0b6ebddcd42f8b137a4ab58","schema_version":"1.0","event_id":"sha256:96b4851ace85d4ac7b2b22520d908459ea7482b4a0b6ebddcd42f8b137a4ab58"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5HSIV27VDMA37IG3BQCFX6K4LY/bundle.json","state_url":"https://pith.science/pith/5HSIV27VDMA37IG3BQCFX6K4LY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5HSIV27VDMA37IG3BQCFX6K4LY/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":"2026-05-31T04:42:31Z","links":{"resolver":"https://pith.science/pith/5HSIV27VDMA37IG3BQCFX6K4LY","bundle":"https://pith.science/pith/5HSIV27VDMA37IG3BQCFX6K4LY/bundle.json","state":"https://pith.science/pith/5HSIV27VDMA37IG3BQCFX6K4LY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5HSIV27VDMA37IG3BQCFX6K4LY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:5HSIV27VDMA37IG3BQCFX6K4LY","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":"f34b29476800098cfba577c20f8bb593a308bc99c9058a24c6cc70691058a0c8","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2005-06-05T19:10:59Z","title_canon_sha256":"3699d3da2f9fbcc0c43788ea3f08ddb4b1aacdaf316316837a22471ac72ed88e"},"schema_version":"1.0","source":{"id":"quant-ph/0506039","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0506039","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0506039v1","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0506039","created_at":"2026-05-18T02:35:06Z"},{"alias_kind":"pith_short_12","alias_value":"5HSIV27VDMA3","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"5HSIV27VDMA37IG3","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"5HSIV27V","created_at":"2026-05-18T12:25:53Z"}],"graph_snapshots":[{"event_id":"sha256:96b4851ace85d4ac7b2b22520d908459ea7482b4a0b6ebddcd42f8b137a4ab58","target":"graph","created_at":"2026-05-18T02:35:06Z","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 consider communication between two parties using a bipartite quantum operation, which constitutes the most general quantum mechanical model of two-party communication. We primarily focus on the simultaneous forward and backward communication of classical messages. For the case in which the two parties share unlimited prior entanglement, we give inner and outer bounds on the achievable rate region that generalize classical results due to Shannon. In particular, using a protocol of Bennett, Harrow, Leung, and Smolin, we give a one-shot expression in terms of the Holevo information for the ent","authors_text":"Andrew M. Childs, Debbie W. Leung, Hoi-Kwong Lo","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2005-06-05T19:10:59Z","title":"Two-way quantum communication channels"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0506039","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":"sha256:6838863b18b43f20879a576a1e8190cd3872dea39eaff0e12a800699faa1a843","target":"record","created_at":"2026-05-18T02:35:06Z","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":"f34b29476800098cfba577c20f8bb593a308bc99c9058a24c6cc70691058a0c8","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2005-06-05T19:10:59Z","title_canon_sha256":"3699d3da2f9fbcc0c43788ea3f08ddb4b1aacdaf316316837a22471ac72ed88e"},"schema_version":"1.0","source":{"id":"quant-ph/0506039","kind":"arxiv","version":1}},"canonical_sha256":"e9e48aebf51b01bfa0db0c045bf95c5e1af4f5cf9429da22526329fba53e60d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e9e48aebf51b01bfa0db0c045bf95c5e1af4f5cf9429da22526329fba53e60d2","first_computed_at":"2026-05-18T02:35:06.829795Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:06.829795Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"s/VWsd4ThqlTx0pElncIbplBtq9eEg/FrUmdb/ukg4ohjWuv3uLJ3xxjJsf06fMMyvVHumbnftovIxlokoDlAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:06.830185Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0506039","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6838863b18b43f20879a576a1e8190cd3872dea39eaff0e12a800699faa1a843","sha256:96b4851ace85d4ac7b2b22520d908459ea7482b4a0b6ebddcd42f8b137a4ab58"],"state_sha256":"c25ba65b5b3d0f77d87c91c1d5290c3eebf4001a4ea1e8b6056ec0498732bb7b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U9ukBJpEOz1R/IahtbO0DG5jRwCxGxiXVelzTo536Z/kwfpKtKLvwWQpCh2gDvkEMeNWrpxeJITu5cpg57zaDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T04:42:31.518493Z","bundle_sha256":"3a61dca61a271a80e70306f23ce3d11f376165a9193bd7a25049d1eb19e3ceec"}}