{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:5GBIDOJL6WXGHZFSTTL52J7IUA","short_pith_number":"pith:5GBIDOJL","canonical_record":{"source":{"id":"1101.4736","kind":"arxiv","version":6},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-01-25T07:23:30Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1a0197a5d9f1f6555e01a416e65770cbc327f3e44e88f642334a3df00603ee1f","abstract_canon_sha256":"81eefaa7acd017cc4bb11d9cc674361d0ce4b712a4b4ec5e04d101217cc981c6"},"schema_version":"1.0"},"canonical_sha256":"e98281b92bf5ae63e4b29cd7dd27e8a033f278cc007464c22b5017a8af86871a","source":{"kind":"arxiv","id":"1101.4736","version":6},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.4736","created_at":"2026-05-18T04:25:12Z"},{"alias_kind":"arxiv_version","alias_value":"1101.4736v6","created_at":"2026-05-18T04:25:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.4736","created_at":"2026-05-18T04:25:12Z"},{"alias_kind":"pith_short_12","alias_value":"5GBIDOJL6WXG","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"5GBIDOJL6WXGHZFS","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"5GBIDOJL","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:5GBIDOJL6WXGHZFSTTL52J7IUA","target":"record","payload":{"canonical_record":{"source":{"id":"1101.4736","kind":"arxiv","version":6},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-01-25T07:23:30Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1a0197a5d9f1f6555e01a416e65770cbc327f3e44e88f642334a3df00603ee1f","abstract_canon_sha256":"81eefaa7acd017cc4bb11d9cc674361d0ce4b712a4b4ec5e04d101217cc981c6"},"schema_version":"1.0"},"canonical_sha256":"e98281b92bf5ae63e4b29cd7dd27e8a033f278cc007464c22b5017a8af86871a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:25:12.824953Z","signature_b64":"flGuGymFbiTYIhzTKLqccjBZDC03zON6neocK9zOXpQ8/RqC4RKE96xgtAMr/1QykpXiY3u+dDWOe/9qhMxMDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e98281b92bf5ae63e4b29cd7dd27e8a033f278cc007464c22b5017a8af86871a","last_reissued_at":"2026-05-18T04:25:12.824227Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:25:12.824227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.4736","source_version":6,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:25:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sOsf5TFnKYFHfjNR+ZkVl1hiO3GKVLgYEUsuyegrXxJx4Q9z7zPGsxD7Kk6euJXZC8Rk8TbyGf4rtG3k84odDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:15:05.449655Z"},"content_sha256":"5e671aa97de015155be9269595afad18ba4bbb5caa761c55d74478fa4e745ffe","schema_version":"1.0","event_id":"sha256:5e671aa97de015155be9269595afad18ba4bbb5caa761c55d74478fa4e745ffe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:5GBIDOJL6WXGHZFSTTL52J7IUA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Wigner distribution function and entanglement of generalized 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, R. P. Singh, Shashi Prabhakar","submitted_at":"2011-01-25T07:23:30Z","abstract_excerpt":"We calculate the Wigner (quasi)probability distribution function of the quantum optical elliptical vortex (QEV), generated by coupling squeezed vacuum states of two modes. The coupling between the two modes is performed by using beam splitter (BS) or a dual channel directional coupler (DCDC). The quantum interference due to the coupling between the two modes promises the generation of controlled entanglement for quantum computation and quantum tomography. We compute the entanglement of such QEV formed by non-classical radiation field, using Wigner function. We report a critical squeezing param"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.4736","kind":"arxiv","version":6},"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":"2026-05-18T04:25:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mdnEDzVX+lVMcU8uqI4GsRUiJiUHpL4QDocjWLnJqdnaxlJ7EYi8E+zgATjBZPzCvkhGJQV5TnxG/88WM47cAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:15:05.450329Z"},"content_sha256":"69719aabc3b6f3133e99f43914b6b49110f191f86930ede5e5b2dade3241bcfc","schema_version":"1.0","event_id":"sha256:69719aabc3b6f3133e99f43914b6b49110f191f86930ede5e5b2dade3241bcfc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5GBIDOJL6WXGHZFSTTL52J7IUA/bundle.json","state_url":"https://pith.science/pith/5GBIDOJL6WXGHZFSTTL52J7IUA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5GBIDOJL6WXGHZFSTTL52J7IUA/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":"2026-05-28T18:15:05Z","links":{"resolver":"https://pith.science/pith/5GBIDOJL6WXGHZFSTTL52J7IUA","bundle":"https://pith.science/pith/5GBIDOJL6WXGHZFSTTL52J7IUA/bundle.json","state":"https://pith.science/pith/5GBIDOJL6WXGHZFSTTL52J7IUA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5GBIDOJL6WXGHZFSTTL52J7IUA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:5GBIDOJL6WXGHZFSTTL52J7IUA","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":"81eefaa7acd017cc4bb11d9cc674361d0ce4b712a4b4ec5e04d101217cc981c6","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-01-25T07:23:30Z","title_canon_sha256":"1a0197a5d9f1f6555e01a416e65770cbc327f3e44e88f642334a3df00603ee1f"},"schema_version":"1.0","source":{"id":"1101.4736","kind":"arxiv","version":6}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.4736","created_at":"2026-05-18T04:25:12Z"},{"alias_kind":"arxiv_version","alias_value":"1101.4736v6","created_at":"2026-05-18T04:25:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.4736","created_at":"2026-05-18T04:25:12Z"},{"alias_kind":"pith_short_12","alias_value":"5GBIDOJL6WXG","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"5GBIDOJL6WXGHZFS","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"5GBIDOJL","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:69719aabc3b6f3133e99f43914b6b49110f191f86930ede5e5b2dade3241bcfc","target":"graph","created_at":"2026-05-18T04:25:12Z","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 calculate the Wigner (quasi)probability distribution function of the quantum optical elliptical vortex (QEV), generated by coupling squeezed vacuum states of two modes. The coupling between the two modes is performed by using beam splitter (BS) or a dual channel directional coupler (DCDC). The quantum interference due to the coupling between the two modes promises the generation of controlled entanglement for quantum computation and quantum tomography. We compute the entanglement of such QEV formed by non-classical radiation field, using Wigner function. We report a critical squeezing param","authors_text":"Abir Bandyopadhyay, R. P. Singh, Shashi Prabhakar","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-01-25T07:23:30Z","title":"Wigner distribution function and entanglement of generalized quantum optical vortex"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.4736","kind":"arxiv","version":6},"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":"sha256:5e671aa97de015155be9269595afad18ba4bbb5caa761c55d74478fa4e745ffe","target":"record","created_at":"2026-05-18T04:25:12Z","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":"81eefaa7acd017cc4bb11d9cc674361d0ce4b712a4b4ec5e04d101217cc981c6","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-01-25T07:23:30Z","title_canon_sha256":"1a0197a5d9f1f6555e01a416e65770cbc327f3e44e88f642334a3df00603ee1f"},"schema_version":"1.0","source":{"id":"1101.4736","kind":"arxiv","version":6}},"canonical_sha256":"e98281b92bf5ae63e4b29cd7dd27e8a033f278cc007464c22b5017a8af86871a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e98281b92bf5ae63e4b29cd7dd27e8a033f278cc007464c22b5017a8af86871a","first_computed_at":"2026-05-18T04:25:12.824227Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:25:12.824227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"flGuGymFbiTYIhzTKLqccjBZDC03zON6neocK9zOXpQ8/RqC4RKE96xgtAMr/1QykpXiY3u+dDWOe/9qhMxMDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:25:12.824953Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.4736","source_kind":"arxiv","source_version":6}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5e671aa97de015155be9269595afad18ba4bbb5caa761c55d74478fa4e745ffe","sha256:69719aabc3b6f3133e99f43914b6b49110f191f86930ede5e5b2dade3241bcfc"],"state_sha256":"015b8c39610746214f53ee5846a37c25a0ffb5caef4682cf9cc88fb827afbda2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CfbGpHvSftaQ2BQGDV5+akdkxd0EZL5k5nSZRyEKZD5rUoL5/vadPXDi28bap6q7HX2/jdBpCHstmPgMB5LZBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T18:15:05.453125Z","bundle_sha256":"7095c90a78e79326e71778cb6b81f712264eed57598d2b149f308cfd2cc2eb0f"}}