{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:ANDM624FQIPYYC3BLOEIZQ34LP","short_pith_number":"pith:ANDM624F","canonical_record":{"source":{"id":"2009.03415","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T20:54:15Z","cross_cats_sorted":[],"title_canon_sha256":"162f676b64b68100bfff6e4ad403fa4c1ce469217bc8c435e440ba31cec5361f","abstract_canon_sha256":"dc2e66a4c12dd8ec87773b9335b524ce3841d871a31af33648d730baeef7903c"},"schema_version":"1.0"},"canonical_sha256":"0346cf6b85821f8c0b615b888cc37c5bf8de36a2ea782cdd55a893b32d37fb4d","source":{"kind":"arxiv","id":"2009.03415","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.03415","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"arxiv_version","alias_value":"2009.03415v1","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.03415","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"pith_short_12","alias_value":"ANDM624FQIPY","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"pith_short_16","alias_value":"ANDM624FQIPYYC3B","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"pith_short_8","alias_value":"ANDM624F","created_at":"2026-07-05T02:23:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:ANDM624FQIPYYC3BLOEIZQ34LP","target":"record","payload":{"canonical_record":{"source":{"id":"2009.03415","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T20:54:15Z","cross_cats_sorted":[],"title_canon_sha256":"162f676b64b68100bfff6e4ad403fa4c1ce469217bc8c435e440ba31cec5361f","abstract_canon_sha256":"dc2e66a4c12dd8ec87773b9335b524ce3841d871a31af33648d730baeef7903c"},"schema_version":"1.0"},"canonical_sha256":"0346cf6b85821f8c0b615b888cc37c5bf8de36a2ea782cdd55a893b32d37fb4d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:23:45.961103Z","signature_b64":"9QBxtL1e5ttgIBz19J4b8CEJQskJD76+85soD7uVn4lVCjdJq/3L035sGQrnNyCjIQLLbjp6VlkVbnkXvZ3jDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0346cf6b85821f8c0b615b888cc37c5bf8de36a2ea782cdd55a893b32d37fb4d","last_reissued_at":"2026-07-05T02:23:45.960642Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:23:45.960642Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.03415","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":"2026-07-05T02:23:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ScT6uBWdP2jb5CVs5e4TEuv4MDF/NFWvnb6BjyfvTlaHJUyBQUcMbUoWR26nY5lHVwl5RMUScOEgQtKK5b5zDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T17:04:31.745080Z"},"content_sha256":"e173b3477fdf5565614fed2dfdc4f4277df3d02a9d35f6c86fe0665ed79ad6b1","schema_version":"1.0","event_id":"sha256:e173b3477fdf5565614fed2dfdc4f4277df3d02a9d35f6c86fe0665ed79ad6b1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:ANDM624FQIPYYC3BLOEIZQ34LP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exponential speedup in measuring out-of-time-ordered correlators with a single bit of quantum information","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Naga Dileep Varikuti, Sreeram PG, Vaibhav Madhok","submitted_at":"2020-09-07T20:54:15Z","abstract_excerpt":"Out-of-time-ordered correlators (OTOC) are a quantifier of quantum information scrambling and quantum chaos. We propose an efficient quantum algorithm to measure OTOCs that provides an exponential speed-up over the best known classical algorithm provided the OTOC operator to be estimated admits an efficient gate decomposition. We also discuss a scheme to obtain information about the eigenvalue spectrum and the spectral density of OTOCs."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.03415","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2009.03415/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:23:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q+h+I1V5cevHrBdno/D+dscvIzIPG9hnsWGY+qgkgzq524cNUMErUiLLfnNNUzwKfR4q7NqzDvuJUVKoRvnQCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T17:04:31.745571Z"},"content_sha256":"a0b152e8595438c82de452d06a3960d2d7ccf68d26f02f28f1cc897a30f51ba2","schema_version":"1.0","event_id":"sha256:a0b152e8595438c82de452d06a3960d2d7ccf68d26f02f28f1cc897a30f51ba2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ANDM624FQIPYYC3BLOEIZQ34LP/bundle.json","state_url":"https://pith.science/pith/ANDM624FQIPYYC3BLOEIZQ34LP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ANDM624FQIPYYC3BLOEIZQ34LP/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":"2026-07-31T17:04:31Z","links":{"resolver":"https://pith.science/pith/ANDM624FQIPYYC3BLOEIZQ34LP","bundle":"https://pith.science/pith/ANDM624FQIPYYC3BLOEIZQ34LP/bundle.json","state":"https://pith.science/pith/ANDM624FQIPYYC3BLOEIZQ34LP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ANDM624FQIPYYC3BLOEIZQ34LP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ANDM624FQIPYYC3BLOEIZQ34LP","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":"dc2e66a4c12dd8ec87773b9335b524ce3841d871a31af33648d730baeef7903c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T20:54:15Z","title_canon_sha256":"162f676b64b68100bfff6e4ad403fa4c1ce469217bc8c435e440ba31cec5361f"},"schema_version":"1.0","source":{"id":"2009.03415","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.03415","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"arxiv_version","alias_value":"2009.03415v1","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.03415","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"pith_short_12","alias_value":"ANDM624FQIPY","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"pith_short_16","alias_value":"ANDM624FQIPYYC3B","created_at":"2026-07-05T02:23:45Z"},{"alias_kind":"pith_short_8","alias_value":"ANDM624F","created_at":"2026-07-05T02:23:45Z"}],"graph_snapshots":[{"event_id":"sha256:a0b152e8595438c82de452d06a3960d2d7ccf68d26f02f28f1cc897a30f51ba2","target":"graph","created_at":"2026-07-05T02:23:45Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2009.03415/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Out-of-time-ordered correlators (OTOC) are a quantifier of quantum information scrambling and quantum chaos. We propose an efficient quantum algorithm to measure OTOCs that provides an exponential speed-up over the best known classical algorithm provided the OTOC operator to be estimated admits an efficient gate decomposition. We also discuss a scheme to obtain information about the eigenvalue spectrum and the spectral density of OTOCs.","authors_text":"Naga Dileep Varikuti, Sreeram PG, Vaibhav Madhok","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T20:54:15Z","title":"Exponential speedup in measuring out-of-time-ordered correlators with a single bit of quantum information"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.03415","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:e173b3477fdf5565614fed2dfdc4f4277df3d02a9d35f6c86fe0665ed79ad6b1","target":"record","created_at":"2026-07-05T02:23:45Z","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":"dc2e66a4c12dd8ec87773b9335b524ce3841d871a31af33648d730baeef7903c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-09-07T20:54:15Z","title_canon_sha256":"162f676b64b68100bfff6e4ad403fa4c1ce469217bc8c435e440ba31cec5361f"},"schema_version":"1.0","source":{"id":"2009.03415","kind":"arxiv","version":1}},"canonical_sha256":"0346cf6b85821f8c0b615b888cc37c5bf8de36a2ea782cdd55a893b32d37fb4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0346cf6b85821f8c0b615b888cc37c5bf8de36a2ea782cdd55a893b32d37fb4d","first_computed_at":"2026-07-05T02:23:45.960642Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:23:45.960642Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9QBxtL1e5ttgIBz19J4b8CEJQskJD76+85soD7uVn4lVCjdJq/3L035sGQrnNyCjIQLLbjp6VlkVbnkXvZ3jDA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:23:45.961103Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.03415","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e173b3477fdf5565614fed2dfdc4f4277df3d02a9d35f6c86fe0665ed79ad6b1","sha256:a0b152e8595438c82de452d06a3960d2d7ccf68d26f02f28f1cc897a30f51ba2"],"state_sha256":"1debd102001154194020ef23e3bb16528dbd591a0ae129860775d0e2a37b568e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xLBdQpKovWB9m5S0Q67fC+M+FK9/FSv+nzWZ9i6TZSwQselU3B7r9YiDCOFkkpSjfhnztHPR81HCHwEfNyvKAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T17:04:31.751049Z","bundle_sha256":"4d6e5bdba6c09122efb6691ab6e10b715ddd1ac3ad9440d6ab647e3bba82c74c"}}