{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:V35TRFPDAU5TBFVHJORRGQIKMC","short_pith_number":"pith:V35TRFPD","canonical_record":{"source":{"id":"1607.07314","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-25T15:22:36Z","cross_cats_sorted":[],"title_canon_sha256":"8feed7876f5c7017c1818565a9f182b2e7e8bbccc2ddeb2a1881927592d6e822","abstract_canon_sha256":"d2105049b5133cc324d5e0b104a593a589b02cdecce091fe823b5f0883754bc7"},"schema_version":"1.0"},"canonical_sha256":"aefb3895e3053b3096a74ba313410a60811aa9d6328cc3983991bfbf9822642c","source":{"kind":"arxiv","id":"1607.07314","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.07314","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"arxiv_version","alias_value":"1607.07314v1","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.07314","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"pith_short_12","alias_value":"V35TRFPDAU5T","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"V35TRFPDAU5TBFVH","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"V35TRFPD","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:V35TRFPDAU5TBFVHJORRGQIKMC","target":"record","payload":{"canonical_record":{"source":{"id":"1607.07314","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-25T15:22:36Z","cross_cats_sorted":[],"title_canon_sha256":"8feed7876f5c7017c1818565a9f182b2e7e8bbccc2ddeb2a1881927592d6e822","abstract_canon_sha256":"d2105049b5133cc324d5e0b104a593a589b02cdecce091fe823b5f0883754bc7"},"schema_version":"1.0"},"canonical_sha256":"aefb3895e3053b3096a74ba313410a60811aa9d6328cc3983991bfbf9822642c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:32:03.078126Z","signature_b64":"F0poudO7pgZF+nCcBD/O5uBZBzDxz6bOxXtXDvmt28OOdjp7lAaWg6KHJE6BvLCdHzfm+g6GnEbWjQuIxmGtDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aefb3895e3053b3096a74ba313410a60811aa9d6328cc3983991bfbf9822642c","last_reissued_at":"2026-05-18T00:32:03.077572Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:32:03.077572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.07314","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":"2026-05-18T00:32:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ogfQiwGDLlzei1DgjORje4yKi9bF35gmrN/ozdty4sHWVxRJejAhzCgNB6xHnYMjTtoPTrB/At/f/npBaE6ZAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T18:55:46.077113Z"},"content_sha256":"fa58254a380a707580f2e888c3133c8fd9e8e8bc0a1a41ede1efbc4961f330a5","schema_version":"1.0","event_id":"sha256:fa58254a380a707580f2e888c3133c8fd9e8e8bc0a1a41ede1efbc4961f330a5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:V35TRFPDAU5TBFVHJORRGQIKMC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Masato Koashi, Nobuyuki Imoto, Rikizo Ikuta, Shota Nozaki, Takashi Yamamoto","submitted_at":"2016-07-25T15:22:36Z","abstract_excerpt":"We experimentally demonstrate a proposal [Phys. Rev. A 87, 052325 (2013)] of a scheme for robust distribution of polarization entangled photon pairs over collective noisy channels having the reciprocity. Although the scheme employs the robustness of two qubit decoherence-free subspace, by utilizing the forward propagation of one half of the entangled photons and the backward propagation of a classical reference light, it achieves an entanglement-sharing rate proportional to the transmittance of the quantum channel for the signal photon. We experimentally observed the efficient sharing rate whi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.07314","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":"2026-05-18T00:32:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lygE3HFJXE8f6g9ee/FgP4sCVb2oo27FhscENPATqx0Gr0HrHhAEysMxKIjLKn3KKMaiBj9wXZJJRaer/C0QBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T18:55:46.077488Z"},"content_sha256":"a13a9bbe7bcffcbafbfad64b5e346bc30876bb815edb0a46ee8d692a60a21ffa","schema_version":"1.0","event_id":"sha256:a13a9bbe7bcffcbafbfad64b5e346bc30876bb815edb0a46ee8d692a60a21ffa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V35TRFPDAU5TBFVHJORRGQIKMC/bundle.json","state_url":"https://pith.science/pith/V35TRFPDAU5TBFVHJORRGQIKMC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V35TRFPDAU5TBFVHJORRGQIKMC/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":"2026-05-21T18:55:46Z","links":{"resolver":"https://pith.science/pith/V35TRFPDAU5TBFVHJORRGQIKMC","bundle":"https://pith.science/pith/V35TRFPDAU5TBFVHJORRGQIKMC/bundle.json","state":"https://pith.science/pith/V35TRFPDAU5TBFVHJORRGQIKMC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V35TRFPDAU5TBFVHJORRGQIKMC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:V35TRFPDAU5TBFVHJORRGQIKMC","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":"d2105049b5133cc324d5e0b104a593a589b02cdecce091fe823b5f0883754bc7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-25T15:22:36Z","title_canon_sha256":"8feed7876f5c7017c1818565a9f182b2e7e8bbccc2ddeb2a1881927592d6e822"},"schema_version":"1.0","source":{"id":"1607.07314","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.07314","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"arxiv_version","alias_value":"1607.07314v1","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.07314","created_at":"2026-05-18T00:32:03Z"},{"alias_kind":"pith_short_12","alias_value":"V35TRFPDAU5T","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"V35TRFPDAU5TBFVH","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"V35TRFPD","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:a13a9bbe7bcffcbafbfad64b5e346bc30876bb815edb0a46ee8d692a60a21ffa","target":"graph","created_at":"2026-05-18T00:32:03Z","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 experimentally demonstrate a proposal [Phys. Rev. A 87, 052325 (2013)] of a scheme for robust distribution of polarization entangled photon pairs over collective noisy channels having the reciprocity. Although the scheme employs the robustness of two qubit decoherence-free subspace, by utilizing the forward propagation of one half of the entangled photons and the backward propagation of a classical reference light, it achieves an entanglement-sharing rate proportional to the transmittance of the quantum channel for the signal photon. We experimentally observed the efficient sharing rate whi","authors_text":"Masato Koashi, Nobuyuki Imoto, Rikizo Ikuta, Shota Nozaki, Takashi Yamamoto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-25T15:22:36Z","title":"Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.07314","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:fa58254a380a707580f2e888c3133c8fd9e8e8bc0a1a41ede1efbc4961f330a5","target":"record","created_at":"2026-05-18T00:32:03Z","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":"d2105049b5133cc324d5e0b104a593a589b02cdecce091fe823b5f0883754bc7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-07-25T15:22:36Z","title_canon_sha256":"8feed7876f5c7017c1818565a9f182b2e7e8bbccc2ddeb2a1881927592d6e822"},"schema_version":"1.0","source":{"id":"1607.07314","kind":"arxiv","version":1}},"canonical_sha256":"aefb3895e3053b3096a74ba313410a60811aa9d6328cc3983991bfbf9822642c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aefb3895e3053b3096a74ba313410a60811aa9d6328cc3983991bfbf9822642c","first_computed_at":"2026-05-18T00:32:03.077572Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:03.077572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F0poudO7pgZF+nCcBD/O5uBZBzDxz6bOxXtXDvmt28OOdjp7lAaWg6KHJE6BvLCdHzfm+g6GnEbWjQuIxmGtDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:03.078126Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.07314","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fa58254a380a707580f2e888c3133c8fd9e8e8bc0a1a41ede1efbc4961f330a5","sha256:a13a9bbe7bcffcbafbfad64b5e346bc30876bb815edb0a46ee8d692a60a21ffa"],"state_sha256":"6656e18d9fb6f89b07ad132029356cdc84f48ecdeb6e05352230cbb24713ed29"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gnPbo+NsH+u2rbNJ9kFIKmI0rUtk+kFZeVmA9V7PFsr/M64Z7rYKyAQE9dItHUfmE0WDzr9myPlYIKi6AGytDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T18:55:46.080170Z","bundle_sha256":"6728ef31f3d46b5a735e43f2b68b70e15c7c12d744d31b9908223eb7e54577ac"}}