{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:ZMZNVLTVAXWPTWXL2XO6JGFO7T","short_pith_number":"pith:ZMZNVLTV","canonical_record":{"source":{"id":"1207.6586","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-07-27T16:03:38Z","cross_cats_sorted":[],"title_canon_sha256":"6a31f5b0c1a5201d54da56bafbdcb14adbcdc50569c8d4ec1c20c8c96475b1f7","abstract_canon_sha256":"40432c67470094f17c49e1055c21dedce1ea49c21370b145edbb9cabcf4faccd"},"schema_version":"1.0"},"canonical_sha256":"cb32daae7505ecf9daebd5dde498aefcf7d9f004dcee69009986d112a3ce148a","source":{"kind":"arxiv","id":"1207.6586","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.6586","created_at":"2026-05-18T02:21:07Z"},{"alias_kind":"arxiv_version","alias_value":"1207.6586v2","created_at":"2026-05-18T02:21:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.6586","created_at":"2026-05-18T02:21:07Z"},{"alias_kind":"pith_short_12","alias_value":"ZMZNVLTVAXWP","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"ZMZNVLTVAXWPTWXL","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"ZMZNVLTV","created_at":"2026-05-18T12:27:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:ZMZNVLTVAXWPTWXL2XO6JGFO7T","target":"record","payload":{"canonical_record":{"source":{"id":"1207.6586","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-07-27T16:03:38Z","cross_cats_sorted":[],"title_canon_sha256":"6a31f5b0c1a5201d54da56bafbdcb14adbcdc50569c8d4ec1c20c8c96475b1f7","abstract_canon_sha256":"40432c67470094f17c49e1055c21dedce1ea49c21370b145edbb9cabcf4faccd"},"schema_version":"1.0"},"canonical_sha256":"cb32daae7505ecf9daebd5dde498aefcf7d9f004dcee69009986d112a3ce148a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:21:07.948774Z","signature_b64":"dynd7X00zw65eINnQhPfxW7LR+lNDkWK0+Gk5RneIHzBpzGs8jZiDuM+MV/GEeQKoIZ5oRYIr7XtJQhCW/FDBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cb32daae7505ecf9daebd5dde498aefcf7d9f004dcee69009986d112a3ce148a","last_reissued_at":"2026-05-18T02:21:07.948298Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:21:07.948298Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.6586","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:21:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IWZYvU2EPko4oDWJKLQKihtAlwPgRuGAer0y55yU/B85Rk2MwoCwlyeCto8FxCThcqb6sd0r4i+7+qQeMm4dDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T01:45:09.813453Z"},"content_sha256":"5087d709057d7ebfd08b692c4d408341ba6715aa851a62203689e992d50bbe66","schema_version":"1.0","event_id":"sha256:5087d709057d7ebfd08b692c4d408341ba6715aa851a62203689e992d50bbe66"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:ZMZNVLTVAXWPTWXL2XO6JGFO7T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cross time-bin photonic entanglement for quantum key distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. Beveratos, A. Martin, A. Vernier, F. Kaiser, S. Tanzilli, V. Scarani","submitted_at":"2012-07-27T16:03:38Z","abstract_excerpt":"We report a fully fibered source emitting cross time-bin entangled photons at 1540 nm from type-II spontaneous parametric down conversion. Compared to standard time-bin entanglement realizations, the preparation interferometer requires no phase stabilization, simplifying its implementation in quantum key distribution experiments. Franson/Bell-type tests of such a cross time-bin state are performed and lead to two-photon interference raw visibilities greater than 95%, which are only limited by the dark-counts in the detectors and imperfections in the analysis system. Just by trusting the random"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.6586","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:21:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"urslvksTe2JCUYdSCklFfSBU9dGk4odUGshheMn5s4jwT2bCwP4himmZFSi22v7EdWigMW+C/OTrCcgbqv+0AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T01:45:09.814008Z"},"content_sha256":"469750b844049e46482d88a04a8e2a9da0921cb1bd1105ce6e62f019aa2db7d7","schema_version":"1.0","event_id":"sha256:469750b844049e46482d88a04a8e2a9da0921cb1bd1105ce6e62f019aa2db7d7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZMZNVLTVAXWPTWXL2XO6JGFO7T/bundle.json","state_url":"https://pith.science/pith/ZMZNVLTVAXWPTWXL2XO6JGFO7T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZMZNVLTVAXWPTWXL2XO6JGFO7T/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":"2026-08-14T01:45:09Z","links":{"resolver":"https://pith.science/pith/ZMZNVLTVAXWPTWXL2XO6JGFO7T","bundle":"https://pith.science/pith/ZMZNVLTVAXWPTWXL2XO6JGFO7T/bundle.json","state":"https://pith.science/pith/ZMZNVLTVAXWPTWXL2XO6JGFO7T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZMZNVLTVAXWPTWXL2XO6JGFO7T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:ZMZNVLTVAXWPTWXL2XO6JGFO7T","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":"40432c67470094f17c49e1055c21dedce1ea49c21370b145edbb9cabcf4faccd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-07-27T16:03:38Z","title_canon_sha256":"6a31f5b0c1a5201d54da56bafbdcb14adbcdc50569c8d4ec1c20c8c96475b1f7"},"schema_version":"1.0","source":{"id":"1207.6586","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.6586","created_at":"2026-05-18T02:21:07Z"},{"alias_kind":"arxiv_version","alias_value":"1207.6586v2","created_at":"2026-05-18T02:21:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.6586","created_at":"2026-05-18T02:21:07Z"},{"alias_kind":"pith_short_12","alias_value":"ZMZNVLTVAXWP","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"ZMZNVLTVAXWPTWXL","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"ZMZNVLTV","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:469750b844049e46482d88a04a8e2a9da0921cb1bd1105ce6e62f019aa2db7d7","target":"graph","created_at":"2026-05-18T02:21:07Z","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 report a fully fibered source emitting cross time-bin entangled photons at 1540 nm from type-II spontaneous parametric down conversion. Compared to standard time-bin entanglement realizations, the preparation interferometer requires no phase stabilization, simplifying its implementation in quantum key distribution experiments. Franson/Bell-type tests of such a cross time-bin state are performed and lead to two-photon interference raw visibilities greater than 95%, which are only limited by the dark-counts in the detectors and imperfections in the analysis system. Just by trusting the random","authors_text":"A. Beveratos, A. Martin, A. Vernier, F. Kaiser, S. Tanzilli, V. Scarani","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-07-27T16:03:38Z","title":"Cross time-bin photonic entanglement for quantum key distribution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.6586","kind":"arxiv","version":2},"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":"sha256:5087d709057d7ebfd08b692c4d408341ba6715aa851a62203689e992d50bbe66","target":"record","created_at":"2026-05-18T02:21:07Z","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":"40432c67470094f17c49e1055c21dedce1ea49c21370b145edbb9cabcf4faccd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-07-27T16:03:38Z","title_canon_sha256":"6a31f5b0c1a5201d54da56bafbdcb14adbcdc50569c8d4ec1c20c8c96475b1f7"},"schema_version":"1.0","source":{"id":"1207.6586","kind":"arxiv","version":2}},"canonical_sha256":"cb32daae7505ecf9daebd5dde498aefcf7d9f004dcee69009986d112a3ce148a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb32daae7505ecf9daebd5dde498aefcf7d9f004dcee69009986d112a3ce148a","first_computed_at":"2026-05-18T02:21:07.948298Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:21:07.948298Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dynd7X00zw65eINnQhPfxW7LR+lNDkWK0+Gk5RneIHzBpzGs8jZiDuM+MV/GEeQKoIZ5oRYIr7XtJQhCW/FDBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:21:07.948774Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.6586","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5087d709057d7ebfd08b692c4d408341ba6715aa851a62203689e992d50bbe66","sha256:469750b844049e46482d88a04a8e2a9da0921cb1bd1105ce6e62f019aa2db7d7"],"state_sha256":"64e9e887064d99d0836658c9a8132f4c3d1adcca21b2316df4e84b68c166e25e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"884E1LR4m8mD34HTdATxrDlYL3fqKa8FWUoOx+vMMgISKTibcAFupShrvkSEN+H0r/Yos7Na9hmRgZls0D+zAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T01:45:09.819505Z","bundle_sha256":"1a7895412b85641a9f1591bb50c1ae2ce4f7051e4570ffeb20ba6b29188388c5"}}