{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:6FNAEWPDRJHHGFIMAISPPHDCJ6","short_pith_number":"pith:6FNAEWPD","canonical_record":{"source":{"id":"1405.6158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-23T18:25:47Z","cross_cats_sorted":[],"title_canon_sha256":"19b7abd60430b438bbad173be28b7e6bac5134e8613ee0307970a9dbc3bebd31","abstract_canon_sha256":"5a6277548c17b34ad377a9d5e439274cc14b4519835b181f0fbe2ba0212db38b"},"schema_version":"1.0"},"canonical_sha256":"f15a0259e38a4e73150c0224f79c624f9d617b190609a4ddd7d68df53e633bb8","source":{"kind":"arxiv","id":"1405.6158","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.6158","created_at":"2026-05-18T02:51:13Z"},{"alias_kind":"arxiv_version","alias_value":"1405.6158v1","created_at":"2026-05-18T02:51:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.6158","created_at":"2026-05-18T02:51:13Z"},{"alias_kind":"pith_short_12","alias_value":"6FNAEWPDRJHH","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"6FNAEWPDRJHHGFIM","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"6FNAEWPD","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:6FNAEWPDRJHHGFIMAISPPHDCJ6","target":"record","payload":{"canonical_record":{"source":{"id":"1405.6158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-23T18:25:47Z","cross_cats_sorted":[],"title_canon_sha256":"19b7abd60430b438bbad173be28b7e6bac5134e8613ee0307970a9dbc3bebd31","abstract_canon_sha256":"5a6277548c17b34ad377a9d5e439274cc14b4519835b181f0fbe2ba0212db38b"},"schema_version":"1.0"},"canonical_sha256":"f15a0259e38a4e73150c0224f79c624f9d617b190609a4ddd7d68df53e633bb8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:51:13.952810Z","signature_b64":"0Ie0V9GYaMEKR0wJCf+tnRKsbalDedKwpY9pg6QBaqLV334qF8lRsVvwI1nVYFrvt1b4XvPHPpcOnN5DOE0nAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f15a0259e38a4e73150c0224f79c624f9d617b190609a4ddd7d68df53e633bb8","last_reissued_at":"2026-05-18T02:51:13.952395Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:51:13.952395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1405.6158","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":"2026-05-18T02:51:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6IqLys7mNmRCAk8T0cv+JqTEP5n3mzpTjb2BuZ1PN25YC4RaMNPgvyPjAbKVg9Up8grlEtR03mO/P4jIUauCAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T01:34:09.852663Z"},"content_sha256":"99189e521cfceffa76ecbd08555ea1bdcbbc2856690e72cd143ec41f180e1659","schema_version":"1.0","event_id":"sha256:99189e521cfceffa76ecbd08555ea1bdcbbc2856690e72cd143ec41f180e1659"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:6FNAEWPDRJHHGFIMAISPPHDCJ6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct Schmidt number measurement of high-gain parametric down conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. Leuchs, I. V. Dyakonov, P. R. Sharapova, T. Sh. Iskhakov","submitted_at":"2014-05-23T18:25:47Z","abstract_excerpt":"In this work we estimate the transverse Schmidt number for the bipartite bright squeezed vacuum state by means of second-order intensity correlation function measurement. Assuming that the number of modes is equal in both beams we determine the Schmidt number considering only one of the subsystems. The obtained results demonstrate that this approach is equally efficient over the whole propagation of the state from the near field to the far field regions of its emitter."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.6158","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":"2026-05-18T02:51:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+fUdzSn0qmK78Yr7eqYA7SuT24Nu23MX09s2IFPsaNhUYQzzXBYjLz9EeCbLyvUg3+Fc7Zp6fWsQw+y2xxowDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T01:34:09.853060Z"},"content_sha256":"a73d016dd84778cfde9367dea6390ac5c3f791566ca4131771687fd4c79f7797","schema_version":"1.0","event_id":"sha256:a73d016dd84778cfde9367dea6390ac5c3f791566ca4131771687fd4c79f7797"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6FNAEWPDRJHHGFIMAISPPHDCJ6/bundle.json","state_url":"https://pith.science/pith/6FNAEWPDRJHHGFIMAISPPHDCJ6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6FNAEWPDRJHHGFIMAISPPHDCJ6/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":"2026-06-08T01:34:09Z","links":{"resolver":"https://pith.science/pith/6FNAEWPDRJHHGFIMAISPPHDCJ6","bundle":"https://pith.science/pith/6FNAEWPDRJHHGFIMAISPPHDCJ6/bundle.json","state":"https://pith.science/pith/6FNAEWPDRJHHGFIMAISPPHDCJ6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6FNAEWPDRJHHGFIMAISPPHDCJ6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:6FNAEWPDRJHHGFIMAISPPHDCJ6","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":"5a6277548c17b34ad377a9d5e439274cc14b4519835b181f0fbe2ba0212db38b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-23T18:25:47Z","title_canon_sha256":"19b7abd60430b438bbad173be28b7e6bac5134e8613ee0307970a9dbc3bebd31"},"schema_version":"1.0","source":{"id":"1405.6158","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.6158","created_at":"2026-05-18T02:51:13Z"},{"alias_kind":"arxiv_version","alias_value":"1405.6158v1","created_at":"2026-05-18T02:51:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.6158","created_at":"2026-05-18T02:51:13Z"},{"alias_kind":"pith_short_12","alias_value":"6FNAEWPDRJHH","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"6FNAEWPDRJHHGFIM","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"6FNAEWPD","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:a73d016dd84778cfde9367dea6390ac5c3f791566ca4131771687fd4c79f7797","target":"graph","created_at":"2026-05-18T02:51:13Z","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":"In this work we estimate the transverse Schmidt number for the bipartite bright squeezed vacuum state by means of second-order intensity correlation function measurement. Assuming that the number of modes is equal in both beams we determine the Schmidt number considering only one of the subsystems. The obtained results demonstrate that this approach is equally efficient over the whole propagation of the state from the near field to the far field regions of its emitter.","authors_text":"G. Leuchs, I. V. Dyakonov, P. R. Sharapova, T. Sh. Iskhakov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-23T18:25:47Z","title":"Direct Schmidt number measurement of high-gain parametric down conversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.6158","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":"sha256:99189e521cfceffa76ecbd08555ea1bdcbbc2856690e72cd143ec41f180e1659","target":"record","created_at":"2026-05-18T02:51:13Z","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":"5a6277548c17b34ad377a9d5e439274cc14b4519835b181f0fbe2ba0212db38b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-23T18:25:47Z","title_canon_sha256":"19b7abd60430b438bbad173be28b7e6bac5134e8613ee0307970a9dbc3bebd31"},"schema_version":"1.0","source":{"id":"1405.6158","kind":"arxiv","version":1}},"canonical_sha256":"f15a0259e38a4e73150c0224f79c624f9d617b190609a4ddd7d68df53e633bb8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f15a0259e38a4e73150c0224f79c624f9d617b190609a4ddd7d68df53e633bb8","first_computed_at":"2026-05-18T02:51:13.952395Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:51:13.952395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0Ie0V9GYaMEKR0wJCf+tnRKsbalDedKwpY9pg6QBaqLV334qF8lRsVvwI1nVYFrvt1b4XvPHPpcOnN5DOE0nAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:51:13.952810Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.6158","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99189e521cfceffa76ecbd08555ea1bdcbbc2856690e72cd143ec41f180e1659","sha256:a73d016dd84778cfde9367dea6390ac5c3f791566ca4131771687fd4c79f7797"],"state_sha256":"06b92fb8a0f16c5c62a1ae1e4bda36434ba72f4c359e5bd40093080042ae39c4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0EPWK7z4TEWaGJT3Plue0TC2eXZPpgWKMZKa7JGvahqxPAGbBg8cyXsOc8Rb6uBXNu9tyhtmSQIY7yuXZatqAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T01:34:09.855987Z","bundle_sha256":"5d2d85ebd54767c6ba9bcf0c6e5a5a95a2a181854104bede2a7d16437abafd58"}}