{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:5XEIJBWOFCVRTDNOAEO62X2XED","short_pith_number":"pith:5XEIJBWO","canonical_record":{"source":{"id":"1903.01468","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-03-04T19:00:00Z","cross_cats_sorted":["cond-mat.stat-mech","hep-th","quant-ph"],"title_canon_sha256":"444c56a9a5cb217ab1169e962b475059b45c4ed25a7a464b834e8e3aa5abfe05","abstract_canon_sha256":"e1a55e08e8b450eae080b995bb1bfdc32dd1af7ec0997425fcf5cc553c7bad8e"},"schema_version":"1.0"},"canonical_sha256":"edc88486ce28ab198dae011ded5f5720d9f802b09484c974bb89850384074b58","source":{"kind":"arxiv","id":"1903.01468","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.01468","created_at":"2026-05-17T23:51:18Z"},{"alias_kind":"arxiv_version","alias_value":"1903.01468v2","created_at":"2026-05-17T23:51:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.01468","created_at":"2026-05-17T23:51:18Z"},{"alias_kind":"pith_short_12","alias_value":"5XEIJBWOFCVR","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5XEIJBWOFCVRTDNO","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5XEIJBWO","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:5XEIJBWOFCVRTDNOAEO62X2XED","target":"record","payload":{"canonical_record":{"source":{"id":"1903.01468","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-03-04T19:00:00Z","cross_cats_sorted":["cond-mat.stat-mech","hep-th","quant-ph"],"title_canon_sha256":"444c56a9a5cb217ab1169e962b475059b45c4ed25a7a464b834e8e3aa5abfe05","abstract_canon_sha256":"e1a55e08e8b450eae080b995bb1bfdc32dd1af7ec0997425fcf5cc553c7bad8e"},"schema_version":"1.0"},"canonical_sha256":"edc88486ce28ab198dae011ded5f5720d9f802b09484c974bb89850384074b58","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:18.978010Z","signature_b64":"tPnF3Kv7xSN15xMCUKqxWbpiy/yL3kOtTLIHm8G+IdrPnGPr6PRVutecp8xMtxl0nfXkuP/TnuCGi9JCTGjABA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"edc88486ce28ab198dae011ded5f5720d9f802b09484c974bb89850384074b58","last_reissued_at":"2026-05-17T23:51:18.977345Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:18.977345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.01468","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yKfd7mo2C0Rf3rTnDdL/dgAhDt7yt+0JJscqEyjD+XnYPGLCfYI/LJrJgVniXMjotRWu7rHItFLxJW6YZHSeAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T16:50:09.529624Z"},"content_sha256":"5d984734fee059936993642dc5fdfac0933b9caacb276c8318d892f06ea03a58","schema_version":"1.0","event_id":"sha256:5d984734fee059936993642dc5fdfac0933b9caacb276c8318d892f06ea03a58"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:5XEIJBWOFCVRTDNOAEO62X2XED","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum many-body dynamics on the star graph","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech","hep-th","quant-ph"],"primary_cat":"cond-mat.str-el","authors_text":"Andrew Lucas","submitted_at":"2019-03-04T19:00:00Z","abstract_excerpt":"We study 2-local Hamiltonian quantum systems, consisting of qubits interacting on the star graph of N vertices. We numerically demonstrate that these models are generically non-integrable at infinite temperature, and find evidence for a finite temperature phase transition to a glassy phase in generic models. Operators can become complicated in constant time: we explicitly find that there is no bound on out-of-time-ordered correlators, even at finite temperature. Operator growth is not correctly modeled by stochastic quantum dynamics, including Brownian Hamiltonian dynamics or random unitary ci"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.01468","kind":"arxiv","version":2},"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":"2026-05-17T23:51:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lPWwpmdKqfm6JN8ZVjsh56TSLlhn3SQaubxcCqHoEQYvluV1+3L8QfFgOzd6gcCYDQ05+S1DM/Ed2bowMc0tAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T16:50:09.530151Z"},"content_sha256":"7a1668af776f2d527d9faf886ff75840094b2379c0645763979d2f031e4aa74f","schema_version":"1.0","event_id":"sha256:7a1668af776f2d527d9faf886ff75840094b2379c0645763979d2f031e4aa74f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5XEIJBWOFCVRTDNOAEO62X2XED/bundle.json","state_url":"https://pith.science/pith/5XEIJBWOFCVRTDNOAEO62X2XED/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5XEIJBWOFCVRTDNOAEO62X2XED/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":"2026-08-08T16:50:09Z","links":{"resolver":"https://pith.science/pith/5XEIJBWOFCVRTDNOAEO62X2XED","bundle":"https://pith.science/pith/5XEIJBWOFCVRTDNOAEO62X2XED/bundle.json","state":"https://pith.science/pith/5XEIJBWOFCVRTDNOAEO62X2XED/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5XEIJBWOFCVRTDNOAEO62X2XED/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:5XEIJBWOFCVRTDNOAEO62X2XED","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":"e1a55e08e8b450eae080b995bb1bfdc32dd1af7ec0997425fcf5cc553c7bad8e","cross_cats_sorted":["cond-mat.stat-mech","hep-th","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-03-04T19:00:00Z","title_canon_sha256":"444c56a9a5cb217ab1169e962b475059b45c4ed25a7a464b834e8e3aa5abfe05"},"schema_version":"1.0","source":{"id":"1903.01468","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.01468","created_at":"2026-05-17T23:51:18Z"},{"alias_kind":"arxiv_version","alias_value":"1903.01468v2","created_at":"2026-05-17T23:51:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.01468","created_at":"2026-05-17T23:51:18Z"},{"alias_kind":"pith_short_12","alias_value":"5XEIJBWOFCVR","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5XEIJBWOFCVRTDNO","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5XEIJBWO","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:7a1668af776f2d527d9faf886ff75840094b2379c0645763979d2f031e4aa74f","target":"graph","created_at":"2026-05-17T23:51:18Z","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 study 2-local Hamiltonian quantum systems, consisting of qubits interacting on the star graph of N vertices. We numerically demonstrate that these models are generically non-integrable at infinite temperature, and find evidence for a finite temperature phase transition to a glassy phase in generic models. Operators can become complicated in constant time: we explicitly find that there is no bound on out-of-time-ordered correlators, even at finite temperature. Operator growth is not correctly modeled by stochastic quantum dynamics, including Brownian Hamiltonian dynamics or random unitary ci","authors_text":"Andrew Lucas","cross_cats":["cond-mat.stat-mech","hep-th","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-03-04T19:00:00Z","title":"Quantum many-body dynamics on the star graph"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.01468","kind":"arxiv","version":2},"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":"sha256:5d984734fee059936993642dc5fdfac0933b9caacb276c8318d892f06ea03a58","target":"record","created_at":"2026-05-17T23:51:18Z","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":"e1a55e08e8b450eae080b995bb1bfdc32dd1af7ec0997425fcf5cc553c7bad8e","cross_cats_sorted":["cond-mat.stat-mech","hep-th","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-03-04T19:00:00Z","title_canon_sha256":"444c56a9a5cb217ab1169e962b475059b45c4ed25a7a464b834e8e3aa5abfe05"},"schema_version":"1.0","source":{"id":"1903.01468","kind":"arxiv","version":2}},"canonical_sha256":"edc88486ce28ab198dae011ded5f5720d9f802b09484c974bb89850384074b58","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"edc88486ce28ab198dae011ded5f5720d9f802b09484c974bb89850384074b58","first_computed_at":"2026-05-17T23:51:18.977345Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:18.977345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tPnF3Kv7xSN15xMCUKqxWbpiy/yL3kOtTLIHm8G+IdrPnGPr6PRVutecp8xMtxl0nfXkuP/TnuCGi9JCTGjABA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:18.978010Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.01468","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5d984734fee059936993642dc5fdfac0933b9caacb276c8318d892f06ea03a58","sha256:7a1668af776f2d527d9faf886ff75840094b2379c0645763979d2f031e4aa74f"],"state_sha256":"81fbfee5d1732c9094be1c8aaf304a578f5ed6718a98b753d29204c4ef0f9789"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NWpHG6m2FBUBz1ubefBW3J2YCntvZoWMQVn90eRYVGynL8Wxfpue0KoyKK8asjZqoQhH+oJNH5Qu+nkymETyBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T16:50:09.535491Z","bundle_sha256":"92a80b958aa8ce24a8380e5d83761d8bc42cf8ce2d78ec1fbdf32d1e3bef525b"}}