{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:L36DOL7UKYNLG6KST4TAWPYRHC","short_pith_number":"pith:L36DOL7U","canonical_record":{"source":{"id":"1210.2867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-10-10T10:57:40Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"38802724f7e2954697dcd73012a158b2a099db3c1db9797b4b691664d32091b2","abstract_canon_sha256":"0ff6bf3f04d8ce61c9726e652fe2c70cb8b0efdd2f056f1527be6fb3f009ec55"},"schema_version":"1.0"},"canonical_sha256":"5efc372ff4561ab379529f260b3f1138b5ffb17181583fb61c62ab99eb244e59","source":{"kind":"arxiv","id":"1210.2867","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2867","created_at":"2026-05-18T03:43:31Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2867v1","created_at":"2026-05-18T03:43:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2867","created_at":"2026-05-18T03:43:31Z"},{"alias_kind":"pith_short_12","alias_value":"L36DOL7UKYNL","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"L36DOL7UKYNLG6KS","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"L36DOL7U","created_at":"2026-05-18T12:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:L36DOL7UKYNLG6KST4TAWPYRHC","target":"record","payload":{"canonical_record":{"source":{"id":"1210.2867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-10-10T10:57:40Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"38802724f7e2954697dcd73012a158b2a099db3c1db9797b4b691664d32091b2","abstract_canon_sha256":"0ff6bf3f04d8ce61c9726e652fe2c70cb8b0efdd2f056f1527be6fb3f009ec55"},"schema_version":"1.0"},"canonical_sha256":"5efc372ff4561ab379529f260b3f1138b5ffb17181583fb61c62ab99eb244e59","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:43:31.331438Z","signature_b64":"uzeichvzpKSf25C1A2vu++r+y8sD1chpkGAA1xHpjOKTYg7aG/9pBTDwRTJhQs/0aI33gatZ6++vGHhCu3BHBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5efc372ff4561ab379529f260b3f1138b5ffb17181583fb61c62ab99eb244e59","last_reissued_at":"2026-05-18T03:43:31.330744Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:43:31.330744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.2867","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":"2026-05-18T03:43:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D+fa49vsbUonIvujDjbmMtUQkrhFy1Zttc66wPY3mFuvAOpqc1v+NHlF/Cdcc+Hbha3yIbSpL2vobwKiu+T0Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:36:44.223363Z"},"content_sha256":"dbe10cf33dab430fab75a9de28ea7e42aa4334c76ec7d7286197d2e2be724f3b","schema_version":"1.0","event_id":"sha256:dbe10cf33dab430fab75a9de28ea7e42aa4334c76ec7d7286197d2e2be724f3b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:L36DOL7UKYNLG6KST4TAWPYRHC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observing the decay of orbital angular momentum entanglement, through experimentally simulated turbulence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.optics","authors_text":"Alpha Hamadou Ibrahim, Andrew Forbes, Filippus S. Roux, Melanie McLaren, Sandeep Goyal, Thomas Konrad","submitted_at":"2012-10-10T10:57:40Z","abstract_excerpt":"We study the evolution of an orbital angular momentum (OAM) entangled bipartite photonic state for the case where one of the photons propagates through Kolmogorov turbulence, using the concurrence as a measure of entanglement. Quantum state tomography was performed to reconstruct the two qubit density matrices for a range of scintillation strengths. Our results give the first direct experimental confirmation of the existing theories for decay of entanglement due to atmospheric turbulence. We also show how the modal scattering increases with increasing scintillation and we discuss the impact of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2867","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":"2026-05-18T03:43:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LDAs3YInMbSfDrNpjsifkNP6RYqVyYiWQtOgCzTDpUAxl3FmLCxYqQAOKc46IZ6RGOT5PnbmrxLF/Xce/HQTBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:36:44.223721Z"},"content_sha256":"58274b7a337c8343acea65de1c52d65b8a9a6f21f9b6e48379e15328479d7742","schema_version":"1.0","event_id":"sha256:58274b7a337c8343acea65de1c52d65b8a9a6f21f9b6e48379e15328479d7742"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L36DOL7UKYNLG6KST4TAWPYRHC/bundle.json","state_url":"https://pith.science/pith/L36DOL7UKYNLG6KST4TAWPYRHC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L36DOL7UKYNLG6KST4TAWPYRHC/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":"2026-06-02T21:36:44Z","links":{"resolver":"https://pith.science/pith/L36DOL7UKYNLG6KST4TAWPYRHC","bundle":"https://pith.science/pith/L36DOL7UKYNLG6KST4TAWPYRHC/bundle.json","state":"https://pith.science/pith/L36DOL7UKYNLG6KST4TAWPYRHC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L36DOL7UKYNLG6KST4TAWPYRHC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:L36DOL7UKYNLG6KST4TAWPYRHC","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":"0ff6bf3f04d8ce61c9726e652fe2c70cb8b0efdd2f056f1527be6fb3f009ec55","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-10-10T10:57:40Z","title_canon_sha256":"38802724f7e2954697dcd73012a158b2a099db3c1db9797b4b691664d32091b2"},"schema_version":"1.0","source":{"id":"1210.2867","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2867","created_at":"2026-05-18T03:43:31Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2867v1","created_at":"2026-05-18T03:43:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2867","created_at":"2026-05-18T03:43:31Z"},{"alias_kind":"pith_short_12","alias_value":"L36DOL7UKYNL","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"L36DOL7UKYNLG6KS","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"L36DOL7U","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:58274b7a337c8343acea65de1c52d65b8a9a6f21f9b6e48379e15328479d7742","target":"graph","created_at":"2026-05-18T03:43:31Z","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 study the evolution of an orbital angular momentum (OAM) entangled bipartite photonic state for the case where one of the photons propagates through Kolmogorov turbulence, using the concurrence as a measure of entanglement. Quantum state tomography was performed to reconstruct the two qubit density matrices for a range of scintillation strengths. Our results give the first direct experimental confirmation of the existing theories for decay of entanglement due to atmospheric turbulence. We also show how the modal scattering increases with increasing scintillation and we discuss the impact of","authors_text":"Alpha Hamadou Ibrahim, Andrew Forbes, Filippus S. Roux, Melanie McLaren, Sandeep Goyal, Thomas Konrad","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-10-10T10:57:40Z","title":"Observing the decay of orbital angular momentum entanglement, through experimentally simulated turbulence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2867","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:dbe10cf33dab430fab75a9de28ea7e42aa4334c76ec7d7286197d2e2be724f3b","target":"record","created_at":"2026-05-18T03:43:31Z","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":"0ff6bf3f04d8ce61c9726e652fe2c70cb8b0efdd2f056f1527be6fb3f009ec55","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-10-10T10:57:40Z","title_canon_sha256":"38802724f7e2954697dcd73012a158b2a099db3c1db9797b4b691664d32091b2"},"schema_version":"1.0","source":{"id":"1210.2867","kind":"arxiv","version":1}},"canonical_sha256":"5efc372ff4561ab379529f260b3f1138b5ffb17181583fb61c62ab99eb244e59","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5efc372ff4561ab379529f260b3f1138b5ffb17181583fb61c62ab99eb244e59","first_computed_at":"2026-05-18T03:43:31.330744Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:43:31.330744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uzeichvzpKSf25C1A2vu++r+y8sD1chpkGAA1xHpjOKTYg7aG/9pBTDwRTJhQs/0aI33gatZ6++vGHhCu3BHBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:43:31.331438Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.2867","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dbe10cf33dab430fab75a9de28ea7e42aa4334c76ec7d7286197d2e2be724f3b","sha256:58274b7a337c8343acea65de1c52d65b8a9a6f21f9b6e48379e15328479d7742"],"state_sha256":"f0059789e78325ea2af9cb326c2df706ba05fee9b2b8c2432de439a2f0a1a92a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YQ2fQhdl2V5opnDl2aviEsSXN7Ah15E3oFOt6bBxRu71bYRom5l528OTUIXMTOIvoT6/iD8SBPh7nkXC3OAGCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T21:36:44.225756Z","bundle_sha256":"9d9ec8e99026b5d8d2a15cf9afd930408f9fc0e073c7714516c0b05a4803e68a"}}