{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:A6YXJ4DBFFIT7IBOIIPFWKR3NW","short_pith_number":"pith:A6YXJ4DB","canonical_record":{"source":{"id":"1603.00321","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-03-01T15:28:56Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"02b3a64e7308fbab79b35a5f1e4207c73fe11aa29321cd90ba5ef31972821638","abstract_canon_sha256":"f2c9ecb7d41266f88b6c31a06e39bedc3afc37b8cf4ee1f795da47375a420aae"},"schema_version":"1.0"},"canonical_sha256":"07b174f06129513fa02e421e5b2a3b6da79e693f9677d51f1fdb21de123f990f","source":{"kind":"arxiv","id":"1603.00321","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.00321","created_at":"2026-05-18T00:56:20Z"},{"alias_kind":"arxiv_version","alias_value":"1603.00321v2","created_at":"2026-05-18T00:56:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.00321","created_at":"2026-05-18T00:56:20Z"},{"alias_kind":"pith_short_12","alias_value":"A6YXJ4DBFFIT","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"A6YXJ4DBFFIT7IBO","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"A6YXJ4DB","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:A6YXJ4DBFFIT7IBOIIPFWKR3NW","target":"record","payload":{"canonical_record":{"source":{"id":"1603.00321","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-03-01T15:28:56Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"02b3a64e7308fbab79b35a5f1e4207c73fe11aa29321cd90ba5ef31972821638","abstract_canon_sha256":"f2c9ecb7d41266f88b6c31a06e39bedc3afc37b8cf4ee1f795da47375a420aae"},"schema_version":"1.0"},"canonical_sha256":"07b174f06129513fa02e421e5b2a3b6da79e693f9677d51f1fdb21de123f990f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:56:20.988558Z","signature_b64":"3NNHhwpN7DVQH1tshfgN6RiSV/bPrM+pBnnnQ/icZhDAPA6acOrrCuqBoalOvMvXR7sx2SHTwJrxY23uXaK0Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"07b174f06129513fa02e421e5b2a3b6da79e693f9677d51f1fdb21de123f990f","last_reissued_at":"2026-05-18T00:56:20.987862Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:56:20.987862Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.00321","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":"2026-05-18T00:56:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EScOa61tH1VIGNk35EvqnW9Y1HRS2Rkxi6swJHdb3VOo41rmXmM8FbE8reTaiF2wnIibLMNlNtHOK9Gz8ejRAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T14:48:01.522663Z"},"content_sha256":"c4ffaa1be8670556e5db43514e47b7652566d9f6f88888a023a4c95824af9991","schema_version":"1.0","event_id":"sha256:c4ffaa1be8670556e5db43514e47b7652566d9f6f88888a023a4c95824af9991"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:A6YXJ4DBFFIT7IBOIIPFWKR3NW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Generating a perfect quantum optical vortex","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Abir Bandyopadhyay, Anindya Banerji, Dhruba Banerjee, Ravindra Pratap Singh","submitted_at":"2016-03-01T15:28:56Z","abstract_excerpt":"In this article we introduce a novel quantum state, the perfect quantum optical vortex state which exhibits a highly localised distribution along a ring in the quadrature space. We examine its nonclassical properties using the Wigner function and the negativity volume. Such a quantum state can be a useful resource for quantum information processing and communication."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.00321","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":"2026-05-18T00:56:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EZHJKCswiHgZ1GFgKmgvKiVK9946ygrJkiaAyzghiSOqq5hIKCruEkl2UKdkhDBsZZvKNOyab9oMPKjbkagzBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T14:48:01.523007Z"},"content_sha256":"efef0eda0bf6a59a0ccb33faee11bad30b3c3217482d7224784ed94258846233","schema_version":"1.0","event_id":"sha256:efef0eda0bf6a59a0ccb33faee11bad30b3c3217482d7224784ed94258846233"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A6YXJ4DBFFIT7IBOIIPFWKR3NW/bundle.json","state_url":"https://pith.science/pith/A6YXJ4DBFFIT7IBOIIPFWKR3NW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A6YXJ4DBFFIT7IBOIIPFWKR3NW/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":"2026-05-29T14:48:01Z","links":{"resolver":"https://pith.science/pith/A6YXJ4DBFFIT7IBOIIPFWKR3NW","bundle":"https://pith.science/pith/A6YXJ4DBFFIT7IBOIIPFWKR3NW/bundle.json","state":"https://pith.science/pith/A6YXJ4DBFFIT7IBOIIPFWKR3NW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A6YXJ4DBFFIT7IBOIIPFWKR3NW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:A6YXJ4DBFFIT7IBOIIPFWKR3NW","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":"f2c9ecb7d41266f88b6c31a06e39bedc3afc37b8cf4ee1f795da47375a420aae","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-03-01T15:28:56Z","title_canon_sha256":"02b3a64e7308fbab79b35a5f1e4207c73fe11aa29321cd90ba5ef31972821638"},"schema_version":"1.0","source":{"id":"1603.00321","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.00321","created_at":"2026-05-18T00:56:20Z"},{"alias_kind":"arxiv_version","alias_value":"1603.00321v2","created_at":"2026-05-18T00:56:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.00321","created_at":"2026-05-18T00:56:20Z"},{"alias_kind":"pith_short_12","alias_value":"A6YXJ4DBFFIT","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"A6YXJ4DBFFIT7IBO","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"A6YXJ4DB","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:efef0eda0bf6a59a0ccb33faee11bad30b3c3217482d7224784ed94258846233","target":"graph","created_at":"2026-05-18T00:56:20Z","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 article we introduce a novel quantum state, the perfect quantum optical vortex state which exhibits a highly localised distribution along a ring in the quadrature space. We examine its nonclassical properties using the Wigner function and the negativity volume. Such a quantum state can be a useful resource for quantum information processing and communication.","authors_text":"Abir Bandyopadhyay, Anindya Banerji, Dhruba Banerjee, Ravindra Pratap Singh","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-03-01T15:28:56Z","title":"Generating a perfect quantum optical vortex"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.00321","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:c4ffaa1be8670556e5db43514e47b7652566d9f6f88888a023a4c95824af9991","target":"record","created_at":"2026-05-18T00:56:20Z","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":"f2c9ecb7d41266f88b6c31a06e39bedc3afc37b8cf4ee1f795da47375a420aae","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-03-01T15:28:56Z","title_canon_sha256":"02b3a64e7308fbab79b35a5f1e4207c73fe11aa29321cd90ba5ef31972821638"},"schema_version":"1.0","source":{"id":"1603.00321","kind":"arxiv","version":2}},"canonical_sha256":"07b174f06129513fa02e421e5b2a3b6da79e693f9677d51f1fdb21de123f990f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"07b174f06129513fa02e421e5b2a3b6da79e693f9677d51f1fdb21de123f990f","first_computed_at":"2026-05-18T00:56:20.987862Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:56:20.987862Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3NNHhwpN7DVQH1tshfgN6RiSV/bPrM+pBnnnQ/icZhDAPA6acOrrCuqBoalOvMvXR7sx2SHTwJrxY23uXaK0Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:56:20.988558Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.00321","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c4ffaa1be8670556e5db43514e47b7652566d9f6f88888a023a4c95824af9991","sha256:efef0eda0bf6a59a0ccb33faee11bad30b3c3217482d7224784ed94258846233"],"state_sha256":"34f167ecc5c8f8c8d73ac786e98e057c089d9ffae0f8b6712d8cdc2e05c5b471"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gOdircoSTeaaqswfSBqVwOHR32+zjJB6DcfRcV+OxlwooobDLv0z5TuDzub/QpH88gmhE4Aox/psPlqTb3zBBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T14:48:01.525227Z","bundle_sha256":"abbd440c53eb080500190c6f25b4474594c2ac9997681ccb21842581f73b335d"}}