{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:RLD6CZKRXKC4NY3LNPZDXURYU6","short_pith_number":"pith:RLD6CZKR","canonical_record":{"source":{"id":"1412.4358","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-14T13:53:20Z","cross_cats_sorted":[],"title_canon_sha256":"04a2b0d215cee318d8c9acdd39122f15e059a6d323cf614459bb8173fc24572f","abstract_canon_sha256":"55b7937c3bf6b08830ea2156bcbd8b4f757b9a1bd20ffc046d6c8157cd501b4f"},"schema_version":"1.0"},"canonical_sha256":"8ac7e16551ba85c6e36b6bf23bd238a7b159ee7c5d3c7503d52f78338e4b1d9f","source":{"kind":"arxiv","id":"1412.4358","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4358","created_at":"2026-05-18T01:41:19Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4358v1","created_at":"2026-05-18T01:41:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4358","created_at":"2026-05-18T01:41:19Z"},{"alias_kind":"pith_short_12","alias_value":"RLD6CZKRXKC4","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_16","alias_value":"RLD6CZKRXKC4NY3L","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_8","alias_value":"RLD6CZKR","created_at":"2026-05-18T12:28:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:RLD6CZKRXKC4NY3LNPZDXURYU6","target":"record","payload":{"canonical_record":{"source":{"id":"1412.4358","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-14T13:53:20Z","cross_cats_sorted":[],"title_canon_sha256":"04a2b0d215cee318d8c9acdd39122f15e059a6d323cf614459bb8173fc24572f","abstract_canon_sha256":"55b7937c3bf6b08830ea2156bcbd8b4f757b9a1bd20ffc046d6c8157cd501b4f"},"schema_version":"1.0"},"canonical_sha256":"8ac7e16551ba85c6e36b6bf23bd238a7b159ee7c5d3c7503d52f78338e4b1d9f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:19.366058Z","signature_b64":"b0rvkJg02yVH1VggZ7tYlwALD5hOvnq5iLP5x5W+0FHeaA9Bq48zYdI/nKKHsrWhouIxRuyKKCDcsmecy3qMBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ac7e16551ba85c6e36b6bf23bd238a7b159ee7c5d3c7503d52f78338e4b1d9f","last_reissued_at":"2026-05-18T01:41:19.365512Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:19.365512Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.4358","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":"2026-05-18T01:41:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OSlLrlyhZvUM9Ew6/dSUQt5gKUiX8JIK9psETFEeDLaDI3qY9UyHm4Pr9bsk+4Bgp5uoNUaiK2Jq1XG4zgC1Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T02:02:18.140034Z"},"content_sha256":"a91871776d184d2e760d544816f597da17e8194a90404ae5a248c37c624d1c1e","schema_version":"1.0","event_id":"sha256:a91871776d184d2e760d544816f597da17e8194a90404ae5a248c37c624d1c1e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:RLD6CZKRXKC4NY3LNPZDXURYU6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Practical implementation of mutually unbiased bases using quantum circuits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. Leuchs, L. L. Sanchez-Soto, U. Seyfarth","submitted_at":"2014-12-14T13:53:20Z","abstract_excerpt":"The number of measurements necessary to perform the quantum state reconstruction of a system of qubits grows exponentially with the number of constituents, creating a major obstacle for the design of scalable tomographic schemes. We work out a simple and efficient method based on cyclic generation of mutually unbiased bases. The basic generator requires only Hadamard and controlled-phase gates, which are available in most practical realizations of these systems. We show how complete sets of mutually unbiased bases with different entanglement structures can be realized for three and four qubits"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4358","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":"2026-05-18T01:41:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n1WAWDcapgMhlWyiKGoCK/K3iGNsCg+m2oRTVrD/SS7e3HG3kXb0vf4jpQXPE8udEZDiOHk9pNohrZde17cYAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T02:02:18.140538Z"},"content_sha256":"81af449569a9b6e6568cd8e858fb3bb2c9e655dd55fd283d3f11ddcbaf23edb4","schema_version":"1.0","event_id":"sha256:81af449569a9b6e6568cd8e858fb3bb2c9e655dd55fd283d3f11ddcbaf23edb4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RLD6CZKRXKC4NY3LNPZDXURYU6/bundle.json","state_url":"https://pith.science/pith/RLD6CZKRXKC4NY3LNPZDXURYU6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RLD6CZKRXKC4NY3LNPZDXURYU6/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":"2026-06-24T02:02:18Z","links":{"resolver":"https://pith.science/pith/RLD6CZKRXKC4NY3LNPZDXURYU6","bundle":"https://pith.science/pith/RLD6CZKRXKC4NY3LNPZDXURYU6/bundle.json","state":"https://pith.science/pith/RLD6CZKRXKC4NY3LNPZDXURYU6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RLD6CZKRXKC4NY3LNPZDXURYU6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:RLD6CZKRXKC4NY3LNPZDXURYU6","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":"55b7937c3bf6b08830ea2156bcbd8b4f757b9a1bd20ffc046d6c8157cd501b4f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-14T13:53:20Z","title_canon_sha256":"04a2b0d215cee318d8c9acdd39122f15e059a6d323cf614459bb8173fc24572f"},"schema_version":"1.0","source":{"id":"1412.4358","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4358","created_at":"2026-05-18T01:41:19Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4358v1","created_at":"2026-05-18T01:41:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4358","created_at":"2026-05-18T01:41:19Z"},{"alias_kind":"pith_short_12","alias_value":"RLD6CZKRXKC4","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_16","alias_value":"RLD6CZKRXKC4NY3L","created_at":"2026-05-18T12:28:46Z"},{"alias_kind":"pith_short_8","alias_value":"RLD6CZKR","created_at":"2026-05-18T12:28:46Z"}],"graph_snapshots":[{"event_id":"sha256:81af449569a9b6e6568cd8e858fb3bb2c9e655dd55fd283d3f11ddcbaf23edb4","target":"graph","created_at":"2026-05-18T01:41:19Z","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":"The number of measurements necessary to perform the quantum state reconstruction of a system of qubits grows exponentially with the number of constituents, creating a major obstacle for the design of scalable tomographic schemes. We work out a simple and efficient method based on cyclic generation of mutually unbiased bases. The basic generator requires only Hadamard and controlled-phase gates, which are available in most practical realizations of these systems. We show how complete sets of mutually unbiased bases with different entanglement structures can be realized for three and four qubits","authors_text":"G. Leuchs, L. L. Sanchez-Soto, U. Seyfarth","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-14T13:53:20Z","title":"Practical implementation of mutually unbiased bases using quantum circuits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4358","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:a91871776d184d2e760d544816f597da17e8194a90404ae5a248c37c624d1c1e","target":"record","created_at":"2026-05-18T01:41:19Z","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":"55b7937c3bf6b08830ea2156bcbd8b4f757b9a1bd20ffc046d6c8157cd501b4f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-12-14T13:53:20Z","title_canon_sha256":"04a2b0d215cee318d8c9acdd39122f15e059a6d323cf614459bb8173fc24572f"},"schema_version":"1.0","source":{"id":"1412.4358","kind":"arxiv","version":1}},"canonical_sha256":"8ac7e16551ba85c6e36b6bf23bd238a7b159ee7c5d3c7503d52f78338e4b1d9f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ac7e16551ba85c6e36b6bf23bd238a7b159ee7c5d3c7503d52f78338e4b1d9f","first_computed_at":"2026-05-18T01:41:19.365512Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:19.365512Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b0rvkJg02yVH1VggZ7tYlwALD5hOvnq5iLP5x5W+0FHeaA9Bq48zYdI/nKKHsrWhouIxRuyKKCDcsmecy3qMBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:19.366058Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.4358","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a91871776d184d2e760d544816f597da17e8194a90404ae5a248c37c624d1c1e","sha256:81af449569a9b6e6568cd8e858fb3bb2c9e655dd55fd283d3f11ddcbaf23edb4"],"state_sha256":"08ba252d315552d18154ce0b06243ac5d6531b7893f63a7f63b032ee3561aef2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DLLovrYllIi3PheBNM1oix+5kqjVFjJPGsY4INbu7iLdz+pyMb8rCO2x+u3hiAVQf7JHjcYOVki/iNomyI6BDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T02:02:18.143294Z","bundle_sha256":"d47d9b1fc0b9609e63bccd696b9c6ef3c8ba8de61b5cf4491880453aa4615e75"}}