{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:BAYVTXZMEEDYPX5JIALKE7XHGH","short_pith_number":"pith:BAYVTXZM","canonical_record":{"source":{"id":"1904.12187","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-27T17:35:06Z","cross_cats_sorted":[],"title_canon_sha256":"e957167dd64fd46bc8d2d0379ca5dca7aa77b5f680e77db3fff23e84a2b40f01","abstract_canon_sha256":"32f0dea2355b050ef1dc2fb94c65805c81ea1b5517a5052fff54fdc6f7e1b8d2"},"schema_version":"1.0"},"canonical_sha256":"083159df2c210787dfa94016a27ee731c796b4255f2e0cf99e3590f2ce491b81","source":{"kind":"arxiv","id":"1904.12187","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.12187","created_at":"2026-05-17T23:47:38Z"},{"alias_kind":"arxiv_version","alias_value":"1904.12187v1","created_at":"2026-05-17T23:47:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.12187","created_at":"2026-05-17T23:47:38Z"},{"alias_kind":"pith_short_12","alias_value":"BAYVTXZMEEDY","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BAYVTXZMEEDYPX5J","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BAYVTXZM","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:BAYVTXZMEEDYPX5JIALKE7XHGH","target":"record","payload":{"canonical_record":{"source":{"id":"1904.12187","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-27T17:35:06Z","cross_cats_sorted":[],"title_canon_sha256":"e957167dd64fd46bc8d2d0379ca5dca7aa77b5f680e77db3fff23e84a2b40f01","abstract_canon_sha256":"32f0dea2355b050ef1dc2fb94c65805c81ea1b5517a5052fff54fdc6f7e1b8d2"},"schema_version":"1.0"},"canonical_sha256":"083159df2c210787dfa94016a27ee731c796b4255f2e0cf99e3590f2ce491b81","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:38.731538Z","signature_b64":"SvEYbaEi0Ss2lkIhF3KNi7T6HZJTqdfnBKtIMHWl5JMdwIEEdRB7fg/v8W/Mv+aidlu1tuhzpjgU7X+x/88jDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"083159df2c210787dfa94016a27ee731c796b4255f2e0cf99e3590f2ce491b81","last_reissued_at":"2026-05-17T23:47:38.731029Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:38.731029Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.12187","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":"2026-05-17T23:47:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AL/ZWpnoG/gkduZMbbgnjAhdQ7hEZtGUz5lVkORzNWBp+B0hUPC5dxLlEcucM8+AAyR1yLcShjD52xzSRjnpCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:33:35.527397Z"},"content_sha256":"9e54df0e202b2b365f1fb504ef7d9293f2c1bc0a60463bd8b481234c30ae2a20","schema_version":"1.0","event_id":"sha256:9e54df0e202b2b365f1fb504ef7d9293f2c1bc0a60463bd8b481234c30ae2a20"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:BAYVTXZMEEDYPX5JIALKE7XHGH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Investigation of quantum pigeonhole effect in IBM quantum computer","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Antariksha Das, Narendra N. Hegade, Prasanta K. Panigrahi, Swarnadeep Seth","submitted_at":"2019-04-27T17:35:06Z","abstract_excerpt":"Quantum pigeonhole principle states that if there are three pigeons and two boxes then there are instances where no two pigeons are in the same box which seems to defy classical pigeonhole counting principle. Here, we investigate the quantum pigeonhole effect on the ibmqx2 superconducting chip with five physical qubits. We also observe the same effect in a proposed non-local circuit which avoid any direct physical interactions between the qubits which may lead to some unknown local effects. We use the standard quantum gate operations and measurement to construct the required quantum circuits o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.12187","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":"2026-05-17T23:47:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2CTQiCU5qRf5nXevvUDAPWKkVNiVFyWlT3T4xmJEP3TmuoYhWO8TD4aOdOjQvkShBhX2wtNOJYVkWrCdaJ5DDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:33:35.528101Z"},"content_sha256":"1789c93d03aaacdc815521762a29237cb0126c1a21893171d1847fa62aa9d7ea","schema_version":"1.0","event_id":"sha256:1789c93d03aaacdc815521762a29237cb0126c1a21893171d1847fa62aa9d7ea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BAYVTXZMEEDYPX5JIALKE7XHGH/bundle.json","state_url":"https://pith.science/pith/BAYVTXZMEEDYPX5JIALKE7XHGH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BAYVTXZMEEDYPX5JIALKE7XHGH/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":"2026-06-06T18:33:35Z","links":{"resolver":"https://pith.science/pith/BAYVTXZMEEDYPX5JIALKE7XHGH","bundle":"https://pith.science/pith/BAYVTXZMEEDYPX5JIALKE7XHGH/bundle.json","state":"https://pith.science/pith/BAYVTXZMEEDYPX5JIALKE7XHGH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BAYVTXZMEEDYPX5JIALKE7XHGH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:BAYVTXZMEEDYPX5JIALKE7XHGH","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":"32f0dea2355b050ef1dc2fb94c65805c81ea1b5517a5052fff54fdc6f7e1b8d2","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-27T17:35:06Z","title_canon_sha256":"e957167dd64fd46bc8d2d0379ca5dca7aa77b5f680e77db3fff23e84a2b40f01"},"schema_version":"1.0","source":{"id":"1904.12187","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.12187","created_at":"2026-05-17T23:47:38Z"},{"alias_kind":"arxiv_version","alias_value":"1904.12187v1","created_at":"2026-05-17T23:47:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.12187","created_at":"2026-05-17T23:47:38Z"},{"alias_kind":"pith_short_12","alias_value":"BAYVTXZMEEDY","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BAYVTXZMEEDYPX5J","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BAYVTXZM","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:1789c93d03aaacdc815521762a29237cb0126c1a21893171d1847fa62aa9d7ea","target":"graph","created_at":"2026-05-17T23:47:38Z","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":"Quantum pigeonhole principle states that if there are three pigeons and two boxes then there are instances where no two pigeons are in the same box which seems to defy classical pigeonhole counting principle. Here, we investigate the quantum pigeonhole effect on the ibmqx2 superconducting chip with five physical qubits. We also observe the same effect in a proposed non-local circuit which avoid any direct physical interactions between the qubits which may lead to some unknown local effects. We use the standard quantum gate operations and measurement to construct the required quantum circuits o","authors_text":"Antariksha Das, Narendra N. Hegade, Prasanta K. Panigrahi, Swarnadeep Seth","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-27T17:35:06Z","title":"Investigation of quantum pigeonhole effect in IBM quantum computer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.12187","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":"sha256:9e54df0e202b2b365f1fb504ef7d9293f2c1bc0a60463bd8b481234c30ae2a20","target":"record","created_at":"2026-05-17T23:47:38Z","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":"32f0dea2355b050ef1dc2fb94c65805c81ea1b5517a5052fff54fdc6f7e1b8d2","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2019-04-27T17:35:06Z","title_canon_sha256":"e957167dd64fd46bc8d2d0379ca5dca7aa77b5f680e77db3fff23e84a2b40f01"},"schema_version":"1.0","source":{"id":"1904.12187","kind":"arxiv","version":1}},"canonical_sha256":"083159df2c210787dfa94016a27ee731c796b4255f2e0cf99e3590f2ce491b81","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"083159df2c210787dfa94016a27ee731c796b4255f2e0cf99e3590f2ce491b81","first_computed_at":"2026-05-17T23:47:38.731029Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:38.731029Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SvEYbaEi0Ss2lkIhF3KNi7T6HZJTqdfnBKtIMHWl5JMdwIEEdRB7fg/v8W/Mv+aidlu1tuhzpjgU7X+x/88jDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:38.731538Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.12187","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e54df0e202b2b365f1fb504ef7d9293f2c1bc0a60463bd8b481234c30ae2a20","sha256:1789c93d03aaacdc815521762a29237cb0126c1a21893171d1847fa62aa9d7ea"],"state_sha256":"e89e36041df957dba5a5ff2c834431cde58b3a1583ba575001f4fa07060881f1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Lm5DcRNp/idfdHF7phKDTj0LWoP87iOB1juVmM79CbIB1UfESpVGTog5ais7yaWIHpKk5BCEIf25AeLHXnrAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T18:33:35.531160Z","bundle_sha256":"f93f6d574da71e384121cb2f2f142d2e2122fa74511e45d18745687d7932c681"}}