{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ILC5CASB3WMVX3KV4ANSEKF232","short_pith_number":"pith:ILC5CASB","canonical_record":{"source":{"id":"1711.11025","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-29T18:53:01Z","cross_cats_sorted":[],"title_canon_sha256":"92db49c114cfa84e32646f4e3283e00bb6210e03a1a5674af286375b43bcebdb","abstract_canon_sha256":"80b4ae7907adc3e5f5dfa8a233fd83e6d0a6c9e64a7a55e745beefb33a31e850"},"schema_version":"1.0"},"canonical_sha256":"42c5d10241dd995bed55e01b2228bade88bd42a692392290847b938c0fe1722b","source":{"kind":"arxiv","id":"1711.11025","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.11025","created_at":"2026-05-18T00:07:18Z"},{"alias_kind":"arxiv_version","alias_value":"1711.11025v3","created_at":"2026-05-18T00:07:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.11025","created_at":"2026-05-18T00:07:18Z"},{"alias_kind":"pith_short_12","alias_value":"ILC5CASB3WMV","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"ILC5CASB3WMVX3KV","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"ILC5CASB","created_at":"2026-05-18T12:31:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ILC5CASB3WMVX3KV4ANSEKF232","target":"record","payload":{"canonical_record":{"source":{"id":"1711.11025","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-29T18:53:01Z","cross_cats_sorted":[],"title_canon_sha256":"92db49c114cfa84e32646f4e3283e00bb6210e03a1a5674af286375b43bcebdb","abstract_canon_sha256":"80b4ae7907adc3e5f5dfa8a233fd83e6d0a6c9e64a7a55e745beefb33a31e850"},"schema_version":"1.0"},"canonical_sha256":"42c5d10241dd995bed55e01b2228bade88bd42a692392290847b938c0fe1722b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:18.202387Z","signature_b64":"FO0t+eGM/3Ygh+a6ZbXFWFFMY508XHrIvk9q/8mk1na82f/2IESyYElaoUnSeg19leiU+mvasVQcpjPDLhSLDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"42c5d10241dd995bed55e01b2228bade88bd42a692392290847b938c0fe1722b","last_reissued_at":"2026-05-18T00:07:18.201757Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:18.201757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.11025","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:07:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mZ8JImDP9nY2XHoEtvVLJCJbThjxDHRJRqkgAboEDJr8JdGbqFY7VuKU+/1oc0ewLmicqVqQ+zm/eYiRAPNAAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T23:34:15.721399Z"},"content_sha256":"b78e4a845a66874bebf1b82fce51bd4dff8f832051dfdd2635dfa14847281b8c","schema_version":"1.0","event_id":"sha256:b78e4a845a66874bebf1b82fce51bd4dff8f832051dfdd2635dfa14847281b8c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ILC5CASB3WMVX3KV4ANSEKF232","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum Algorithm for Spectral Measurement with Lower Gate Count","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alexei Kitaev, Damian S. Steiger, David Poulin, Matthew B. Hastings, Matthias Troyer","submitted_at":"2017-11-29T18:53:01Z","abstract_excerpt":"We present two techniques that can greatly reduce the number of gates required to realize an energy measurement, with application to ground state preparation in quantum simulations. The first technique realizes that to prepare the ground state of some Hamiltonian, it is not necessary to implement the time-evolution operator: any unitary operator which is a function of the Hamiltonian will do. We propose one such unitary operator which can be implemented exactly, circumventing any Taylor or Trotter approximation errors. The second technique is tailored to lattice models, and is targeted at redu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.11025","kind":"arxiv","version":3},"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":"2026-05-18T00:07:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jRsw2TcQk7g9tjwQf/a1MSLk7JYkFyHYH1j38k5Zu4Rp3u+1BS3nrkbuMXRyMhONVqEX7w3s0+rE61s8bfSvCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T23:34:15.721744Z"},"content_sha256":"238554b88566e4f5ed355bab04d3a5abaec49aff95bce2b4fc21d0758fb2ef7a","schema_version":"1.0","event_id":"sha256:238554b88566e4f5ed355bab04d3a5abaec49aff95bce2b4fc21d0758fb2ef7a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ILC5CASB3WMVX3KV4ANSEKF232/bundle.json","state_url":"https://pith.science/pith/ILC5CASB3WMVX3KV4ANSEKF232/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ILC5CASB3WMVX3KV4ANSEKF232/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":"2026-06-30T23:34:15Z","links":{"resolver":"https://pith.science/pith/ILC5CASB3WMVX3KV4ANSEKF232","bundle":"https://pith.science/pith/ILC5CASB3WMVX3KV4ANSEKF232/bundle.json","state":"https://pith.science/pith/ILC5CASB3WMVX3KV4ANSEKF232/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ILC5CASB3WMVX3KV4ANSEKF232/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ILC5CASB3WMVX3KV4ANSEKF232","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":"80b4ae7907adc3e5f5dfa8a233fd83e6d0a6c9e64a7a55e745beefb33a31e850","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-29T18:53:01Z","title_canon_sha256":"92db49c114cfa84e32646f4e3283e00bb6210e03a1a5674af286375b43bcebdb"},"schema_version":"1.0","source":{"id":"1711.11025","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.11025","created_at":"2026-05-18T00:07:18Z"},{"alias_kind":"arxiv_version","alias_value":"1711.11025v3","created_at":"2026-05-18T00:07:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.11025","created_at":"2026-05-18T00:07:18Z"},{"alias_kind":"pith_short_12","alias_value":"ILC5CASB3WMV","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"ILC5CASB3WMVX3KV","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"ILC5CASB","created_at":"2026-05-18T12:31:21Z"}],"graph_snapshots":[{"event_id":"sha256:238554b88566e4f5ed355bab04d3a5abaec49aff95bce2b4fc21d0758fb2ef7a","target":"graph","created_at":"2026-05-18T00:07:18Z","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 present two techniques that can greatly reduce the number of gates required to realize an energy measurement, with application to ground state preparation in quantum simulations. The first technique realizes that to prepare the ground state of some Hamiltonian, it is not necessary to implement the time-evolution operator: any unitary operator which is a function of the Hamiltonian will do. We propose one such unitary operator which can be implemented exactly, circumventing any Taylor or Trotter approximation errors. The second technique is tailored to lattice models, and is targeted at redu","authors_text":"Alexei Kitaev, Damian S. Steiger, David Poulin, Matthew B. Hastings, Matthias Troyer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-29T18:53:01Z","title":"Quantum Algorithm for Spectral Measurement with Lower Gate Count"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.11025","kind":"arxiv","version":3},"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:b78e4a845a66874bebf1b82fce51bd4dff8f832051dfdd2635dfa14847281b8c","target":"record","created_at":"2026-05-18T00:07:18Z","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":"80b4ae7907adc3e5f5dfa8a233fd83e6d0a6c9e64a7a55e745beefb33a31e850","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-11-29T18:53:01Z","title_canon_sha256":"92db49c114cfa84e32646f4e3283e00bb6210e03a1a5674af286375b43bcebdb"},"schema_version":"1.0","source":{"id":"1711.11025","kind":"arxiv","version":3}},"canonical_sha256":"42c5d10241dd995bed55e01b2228bade88bd42a692392290847b938c0fe1722b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42c5d10241dd995bed55e01b2228bade88bd42a692392290847b938c0fe1722b","first_computed_at":"2026-05-18T00:07:18.201757Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:18.201757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FO0t+eGM/3Ygh+a6ZbXFWFFMY508XHrIvk9q/8mk1na82f/2IESyYElaoUnSeg19leiU+mvasVQcpjPDLhSLDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:18.202387Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.11025","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b78e4a845a66874bebf1b82fce51bd4dff8f832051dfdd2635dfa14847281b8c","sha256:238554b88566e4f5ed355bab04d3a5abaec49aff95bce2b4fc21d0758fb2ef7a"],"state_sha256":"fb9d0d5c2f572a763d3cbae1c8b8ca88957ce01b4fda5f6a0dd7dc11d196c4ce"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7TzFem5kUIECNzYhqBXtor/mqOJbvueETMERDiFRr1DSlolmcvLrYdO5+Eioh+fEG5fUVRlCvBbJZgCtTgrJCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-30T23:34:15.723840Z","bundle_sha256":"a4589540412ccd4e5b171e6a0bf4753b385e69c857350f40059c35defd0b6246"}}