{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:NASRXZZ6CGL75VZQH245GRW6WQ","short_pith_number":"pith:NASRXZZ6","schema_version":"1.0","canonical_sha256":"68251be73e1197fed7303eb9d346deb42a1d81fce0808e039b6025ac7eef096d","source":{"kind":"arxiv","id":"1607.00079","version":1},"attestation_state":"computed","paper":{"title":"Measurement of many-body chaos using a quantum clock","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.quant-gas","cond-mat.str-el","hep-th"],"primary_cat":"quant-ph","authors_text":"Guanyu Zhu, Mohammad Hafezi, Tarun Grover","submitted_at":"2016-06-30T23:22:51Z","abstract_excerpt":"There has been recent progress in understanding chaotic features in many-body quantum systems. Motivated by the scrambling of information in black holes, it has been suggested that the time dependence of out-of-time-ordered (OTO) correlation functions such as $\\langle O_2(t) O_1(0) O_2(t) O_1(0) \\rangle $ is a faithful measure of quantum chaos. Experimentally, these correlators are challenging to access since they apparently require access to both forward and backward time evolution with the system Hamiltonian. Here, we propose a protocol to measure such OTO correlators using an ancilla which "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1607.00079","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-06-30T23:22:51Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.quant-gas","cond-mat.str-el","hep-th"],"title_canon_sha256":"035d862cc6ab2298d117b2f21a7a09a2f9c06290eb31e42b3a39dfa9abc42517","abstract_canon_sha256":"f78235aeda3115b8a6b326c4b83733f99d1ee8869b306f9dec3cf9d60aaffdee"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:59.850988Z","signature_b64":"9xORJTlMBo1gxW7UiCfi0Gw/bbeKLetl14VFmkq9jRSCkfhAU4s0j5JyPMBARLPQRgEtJ+Va1RwzHym1ub2WAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"68251be73e1197fed7303eb9d346deb42a1d81fce0808e039b6025ac7eef096d","last_reissued_at":"2026-05-18T00:53:59.850374Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:59.850374Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurement of many-body chaos using a quantum clock","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.quant-gas","cond-mat.str-el","hep-th"],"primary_cat":"quant-ph","authors_text":"Guanyu Zhu, Mohammad Hafezi, Tarun Grover","submitted_at":"2016-06-30T23:22:51Z","abstract_excerpt":"There has been recent progress in understanding chaotic features in many-body quantum systems. Motivated by the scrambling of information in black holes, it has been suggested that the time dependence of out-of-time-ordered (OTO) correlation functions such as $\\langle O_2(t) O_1(0) O_2(t) O_1(0) \\rangle $ is a faithful measure of quantum chaos. Experimentally, these correlators are challenging to access since they apparently require access to both forward and backward time evolution with the system Hamiltonian. Here, we propose a protocol to measure such OTO correlators using an ancilla which "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.00079","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1607.00079","created_at":"2026-05-18T00:53:59.850475+00:00"},{"alias_kind":"arxiv_version","alias_value":"1607.00079v1","created_at":"2026-05-18T00:53:59.850475+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.00079","created_at":"2026-05-18T00:53:59.850475+00:00"},{"alias_kind":"pith_short_12","alias_value":"NASRXZZ6CGL7","created_at":"2026-05-18T12:30:32.724797+00:00"},{"alias_kind":"pith_short_16","alias_value":"NASRXZZ6CGL75VZQ","created_at":"2026-05-18T12:30:32.724797+00:00"},{"alias_kind":"pith_short_8","alias_value":"NASRXZZ6","created_at":"2026-05-18T12:30:32.724797+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2604.12745","citing_title":"Quantum chaos in many-body systems of indistinguishable particles","ref_index":154,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ","json":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ.json","graph_json":"https://pith.science/api/pith-number/NASRXZZ6CGL75VZQH245GRW6WQ/graph.json","events_json":"https://pith.science/api/pith-number/NASRXZZ6CGL75VZQH245GRW6WQ/events.json","paper":"https://pith.science/paper/NASRXZZ6"},"agent_actions":{"view_html":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ","download_json":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ.json","view_paper":"https://pith.science/paper/NASRXZZ6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1607.00079&json=true","fetch_graph":"https://pith.science/api/pith-number/NASRXZZ6CGL75VZQH245GRW6WQ/graph.json","fetch_events":"https://pith.science/api/pith-number/NASRXZZ6CGL75VZQH245GRW6WQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ/action/storage_attestation","attest_author":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ/action/author_attestation","sign_citation":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ/action/citation_signature","submit_replication":"https://pith.science/pith/NASRXZZ6CGL75VZQH245GRW6WQ/action/replication_record"}},"created_at":"2026-05-18T00:53:59.850475+00:00","updated_at":"2026-05-18T00:53:59.850475+00:00"}