{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:X446R7QEVRIZENA5PGQA3LGJJ7","short_pith_number":"pith:X446R7QE","canonical_record":{"source":{"id":"1110.4867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-21T18:50:39Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"e98c73b369cca6a13a4ebbe346501ca4f10e3f9aff717b60a0857d24641d2894","abstract_canon_sha256":"0936a4a027077e1bf42e9954aa4f2c0af40fa875a45092fbfc50c2b7790d574c"},"schema_version":"1.0"},"canonical_sha256":"bf39e8fe04ac5192341d79a00dacc94fc7a416108fef3f4ea78133e5dabbba72","source":{"kind":"arxiv","id":"1110.4867","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.4867","created_at":"2026-05-18T04:10:34Z"},{"alias_kind":"arxiv_version","alias_value":"1110.4867v1","created_at":"2026-05-18T04:10:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.4867","created_at":"2026-05-18T04:10:34Z"},{"alias_kind":"pith_short_12","alias_value":"X446R7QEVRIZ","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"X446R7QEVRIZENA5","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"X446R7QE","created_at":"2026-05-18T12:26:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:X446R7QEVRIZENA5PGQA3LGJJ7","target":"record","payload":{"canonical_record":{"source":{"id":"1110.4867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-21T18:50:39Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"e98c73b369cca6a13a4ebbe346501ca4f10e3f9aff717b60a0857d24641d2894","abstract_canon_sha256":"0936a4a027077e1bf42e9954aa4f2c0af40fa875a45092fbfc50c2b7790d574c"},"schema_version":"1.0"},"canonical_sha256":"bf39e8fe04ac5192341d79a00dacc94fc7a416108fef3f4ea78133e5dabbba72","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:10:34.844257Z","signature_b64":"AsTiDrhOUYwXdtpQenPke6O7D9nNAlr24CruwFRb8YjaIQdDgCLFJk2y+hhQ7BVcotbJZxGW7Qj12dK6XPHTBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf39e8fe04ac5192341d79a00dacc94fc7a416108fef3f4ea78133e5dabbba72","last_reissued_at":"2026-05-18T04:10:34.843464Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:10:34.843464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1110.4867","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":"2026-05-18T04:10:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zHFXyBZCyHW13Atlz9B7QSgUxvAg/7CgLzhQ2jmsJVxBZcScHLbiXD7wqXJEcUVR/lLPjCmWyOOyJ+428EAyAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T15:43:45.593719Z"},"content_sha256":"8e6fa7d6b3565bb91f38e2ae67c30af3c78e75f95c5007363059b87c84466ba9","schema_version":"1.0","event_id":"sha256:8e6fa7d6b3565bb91f38e2ae67c30af3c78e75f95c5007363059b87c84466ba9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:X446R7QEVRIZENA5PGQA3LGJJ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dense Wavelength Division Multiplexed Quantum Key Distribution Using Entangled Photons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Dirk Englund, F.N.C. Wong, Jacob Mower, Jeff H. Shapiro","submitted_at":"2011-10-21T18:50:39Z","abstract_excerpt":"Quantum key distribution (QKD) enables two parties to establish a secret key over a potentially hostile channel by exchanging photonic quantum states, relying on the fact that it is impossible for an eavesdropper to tap the quantum channel without disturbing these photons in a way that can be detected [1]. Here we introduce a large-alphabet QKD protocol that makes optimal use of temporal and spectral correlations of entangled photons, reaching the maximum number of inde- pendent basis states (the Schmidt number) and enabling extremely high information content per photon together with an optima"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.4867","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":"2026-05-18T04:10:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cli4EiZtOUH9k1AU+ffIA7y/uJU6YWUz+dPn2SYYevBkONRFWPyvU2xVIAWIIcpHuR6/Gxb5W2r7Z3HBOU/iAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T15:43:45.594424Z"},"content_sha256":"74d140d67a6991d205b2ca5129a7d3df9d26774bff3c76295613302ffd822f3c","schema_version":"1.0","event_id":"sha256:74d140d67a6991d205b2ca5129a7d3df9d26774bff3c76295613302ffd822f3c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X446R7QEVRIZENA5PGQA3LGJJ7/bundle.json","state_url":"https://pith.science/pith/X446R7QEVRIZENA5PGQA3LGJJ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X446R7QEVRIZENA5PGQA3LGJJ7/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":"2026-06-07T15:43:45Z","links":{"resolver":"https://pith.science/pith/X446R7QEVRIZENA5PGQA3LGJJ7","bundle":"https://pith.science/pith/X446R7QEVRIZENA5PGQA3LGJJ7/bundle.json","state":"https://pith.science/pith/X446R7QEVRIZENA5PGQA3LGJJ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X446R7QEVRIZENA5PGQA3LGJJ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:X446R7QEVRIZENA5PGQA3LGJJ7","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":"0936a4a027077e1bf42e9954aa4f2c0af40fa875a45092fbfc50c2b7790d574c","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-21T18:50:39Z","title_canon_sha256":"e98c73b369cca6a13a4ebbe346501ca4f10e3f9aff717b60a0857d24641d2894"},"schema_version":"1.0","source":{"id":"1110.4867","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.4867","created_at":"2026-05-18T04:10:34Z"},{"alias_kind":"arxiv_version","alias_value":"1110.4867v1","created_at":"2026-05-18T04:10:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.4867","created_at":"2026-05-18T04:10:34Z"},{"alias_kind":"pith_short_12","alias_value":"X446R7QEVRIZ","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_16","alias_value":"X446R7QEVRIZENA5","created_at":"2026-05-18T12:26:44Z"},{"alias_kind":"pith_short_8","alias_value":"X446R7QE","created_at":"2026-05-18T12:26:44Z"}],"graph_snapshots":[{"event_id":"sha256:74d140d67a6991d205b2ca5129a7d3df9d26774bff3c76295613302ffd822f3c","target":"graph","created_at":"2026-05-18T04:10:34Z","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 key distribution (QKD) enables two parties to establish a secret key over a potentially hostile channel by exchanging photonic quantum states, relying on the fact that it is impossible for an eavesdropper to tap the quantum channel without disturbing these photons in a way that can be detected [1]. Here we introduce a large-alphabet QKD protocol that makes optimal use of temporal and spectral correlations of entangled photons, reaching the maximum number of inde- pendent basis states (the Schmidt number) and enabling extremely high information content per photon together with an optima","authors_text":"Dirk Englund, F.N.C. Wong, Jacob Mower, Jeff H. Shapiro","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-21T18:50:39Z","title":"Dense Wavelength Division Multiplexed Quantum Key Distribution Using Entangled Photons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.4867","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":"sha256:8e6fa7d6b3565bb91f38e2ae67c30af3c78e75f95c5007363059b87c84466ba9","target":"record","created_at":"2026-05-18T04:10:34Z","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":"0936a4a027077e1bf42e9954aa4f2c0af40fa875a45092fbfc50c2b7790d574c","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-10-21T18:50:39Z","title_canon_sha256":"e98c73b369cca6a13a4ebbe346501ca4f10e3f9aff717b60a0857d24641d2894"},"schema_version":"1.0","source":{"id":"1110.4867","kind":"arxiv","version":1}},"canonical_sha256":"bf39e8fe04ac5192341d79a00dacc94fc7a416108fef3f4ea78133e5dabbba72","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf39e8fe04ac5192341d79a00dacc94fc7a416108fef3f4ea78133e5dabbba72","first_computed_at":"2026-05-18T04:10:34.843464Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:10:34.843464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AsTiDrhOUYwXdtpQenPke6O7D9nNAlr24CruwFRb8YjaIQdDgCLFJk2y+hhQ7BVcotbJZxGW7Qj12dK6XPHTBw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:10:34.844257Z","signed_message":"canonical_sha256_bytes"},"source_id":"1110.4867","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e6fa7d6b3565bb91f38e2ae67c30af3c78e75f95c5007363059b87c84466ba9","sha256:74d140d67a6991d205b2ca5129a7d3df9d26774bff3c76295613302ffd822f3c"],"state_sha256":"d49d3b583ac54744fa07ca24f276041bff8816093855069c5f8698b20f8e1da0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LUn80wSxJyM5Y7AlznUL+Qo+FfATtJPg8CIWehMx3/takECwrbP5eDdttgGodK8PMbijG21NJLesW6Jcgz8TDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T15:43:45.598217Z","bundle_sha256":"5b28f1f362f6b5a707376aacd11851684a08ee704772f75421120ebcd4fb47ba"}}