{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:OPY2N6C2VN2ATQ7IJNG2IJKORO","short_pith_number":"pith:OPY2N6C2","schema_version":"1.0","canonical_sha256":"73f1a6f85aab7409c3e84b4da4254e8ba16478044cbb2df5b60b349af58f9c1d","source":{"kind":"arxiv","id":"1305.1083","version":2},"attestation_state":"computed","paper":{"title":"Robustness of quantum communication based on a decoherence-free subspace using a counter-propagating weak coherent light pulse","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Hidetoshi Kumagai, Masato Koashi, Nobuyuki Imoto, Takashi Yamamoto","submitted_at":"2013-05-06T04:17:58Z","abstract_excerpt":"We study distribution schemes for a polarization entangled photon pair based on a decoherence-free subspace over lossy quantum channels and propose an efficient scheme that is robust against not only collective phase noises but also general collective noises for two qubits. While the proposed scheme employs two photons to build the decoherence-free subspace, the success probability is proportional to the channel transmittance of a single photon with the aid of a counter-propagating weak coherent light pulse. The key ingredient in the scheme is found to be the reciprocity of the channel. The pr"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1305.1083","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-05-06T04:17:58Z","cross_cats_sorted":[],"title_canon_sha256":"94fbdc5bf2e2202e0029a1f494fffc36574230808d51fcccabbe1b2a580b7c47","abstract_canon_sha256":"0ce5622d268541e444925e06ed704cf00611f287b17c17ad4669ef2635acabb6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:20:58.230527Z","signature_b64":"vw95Sk/CKkVb1kxOkNHIzEYlg4oYawDCz3l3UzleiQxaX6xgZJX3eJYylycagQBP3RDfU9Ki5G2TSI1RsZ+2Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"73f1a6f85aab7409c3e84b4da4254e8ba16478044cbb2df5b60b349af58f9c1d","last_reissued_at":"2026-05-18T03:20:58.229789Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:20:58.229789Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Robustness of quantum communication based on a decoherence-free subspace using a counter-propagating weak coherent light pulse","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Hidetoshi Kumagai, Masato Koashi, Nobuyuki Imoto, Takashi Yamamoto","submitted_at":"2013-05-06T04:17:58Z","abstract_excerpt":"We study distribution schemes for a polarization entangled photon pair based on a decoherence-free subspace over lossy quantum channels and propose an efficient scheme that is robust against not only collective phase noises but also general collective noises for two qubits. While the proposed scheme employs two photons to build the decoherence-free subspace, the success probability is proportional to the channel transmittance of a single photon with the aid of a counter-propagating weak coherent light pulse. The key ingredient in the scheme is found to be the reciprocity of the channel. The pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.1083","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1305.1083","created_at":"2026-05-18T03:20:58.229901+00:00"},{"alias_kind":"arxiv_version","alias_value":"1305.1083v2","created_at":"2026-05-18T03:20:58.229901+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.1083","created_at":"2026-05-18T03:20:58.229901+00:00"},{"alias_kind":"pith_short_12","alias_value":"OPY2N6C2VN2A","created_at":"2026-05-18T12:27:54.935989+00:00"},{"alias_kind":"pith_short_16","alias_value":"OPY2N6C2VN2ATQ7I","created_at":"2026-05-18T12:27:54.935989+00:00"},{"alias_kind":"pith_short_8","alias_value":"OPY2N6C2","created_at":"2026-05-18T12:27:54.935989+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO","json":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO.json","graph_json":"https://pith.science/api/pith-number/OPY2N6C2VN2ATQ7IJNG2IJKORO/graph.json","events_json":"https://pith.science/api/pith-number/OPY2N6C2VN2ATQ7IJNG2IJKORO/events.json","paper":"https://pith.science/paper/OPY2N6C2"},"agent_actions":{"view_html":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO","download_json":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO.json","view_paper":"https://pith.science/paper/OPY2N6C2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1305.1083&json=true","fetch_graph":"https://pith.science/api/pith-number/OPY2N6C2VN2ATQ7IJNG2IJKORO/graph.json","fetch_events":"https://pith.science/api/pith-number/OPY2N6C2VN2ATQ7IJNG2IJKORO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO/action/storage_attestation","attest_author":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO/action/author_attestation","sign_citation":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO/action/citation_signature","submit_replication":"https://pith.science/pith/OPY2N6C2VN2ATQ7IJNG2IJKORO/action/replication_record"}},"created_at":"2026-05-18T03:20:58.229901+00:00","updated_at":"2026-05-18T03:20:58.229901+00:00"}