{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:TV2PDUNJTKPPSCWSWH42GVHKGW","short_pith_number":"pith:TV2PDUNJ","canonical_record":{"source":{"id":"1812.08826","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.dis-nn","submitted_at":"2018-12-20T20:12:34Z","cross_cats_sorted":["nlin.CD","nlin.SI"],"title_canon_sha256":"627fa213ede690b592d1cb847a98b1e5bdae77e775c644d99240aa0fdf1e952e","abstract_canon_sha256":"c2919093259a51c63513e9a2e32f9b3e4c6848040b539770e64619ffb46b85f4"},"schema_version":"1.0"},"canonical_sha256":"9d74f1d1a99a9ef90ad2b1f9a354ea35b3d27f7c04b1b734a226a2d4e0aaa194","source":{"kind":"arxiv","id":"1812.08826","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.08826","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"arxiv_version","alias_value":"1812.08826v1","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.08826","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"pith_short_12","alias_value":"TV2PDUNJTKPP","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"TV2PDUNJTKPPSCWS","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"TV2PDUNJ","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:TV2PDUNJTKPPSCWSWH42GVHKGW","target":"record","payload":{"canonical_record":{"source":{"id":"1812.08826","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.dis-nn","submitted_at":"2018-12-20T20:12:34Z","cross_cats_sorted":["nlin.CD","nlin.SI"],"title_canon_sha256":"627fa213ede690b592d1cb847a98b1e5bdae77e775c644d99240aa0fdf1e952e","abstract_canon_sha256":"c2919093259a51c63513e9a2e32f9b3e4c6848040b539770e64619ffb46b85f4"},"schema_version":"1.0"},"canonical_sha256":"9d74f1d1a99a9ef90ad2b1f9a354ea35b3d27f7c04b1b734a226a2d4e0aaa194","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:10.439616Z","signature_b64":"dnUsDxdGrvih+ERbClq887Pv7a3XFck3WZJyt5vqKjwVGihzxoX5o+gEqm45McL8K8mTWU4khqbZR5nrO7oXBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d74f1d1a99a9ef90ad2b1f9a354ea35b3d27f7c04b1b734a226a2d4e0aaa194","last_reissued_at":"2026-05-17T23:55:10.439117Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:10.439117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.08826","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":"2026-05-17T23:55:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PdzQgiC3Ctsl4bJ7mJVQoRgeaLNqpjsZyMj8iZ6hwOoMM/HIkO/a3m6msrfjdtIziNX4tURn7eAX7yAAFGaFDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:21:31.615108Z"},"content_sha256":"d105be636bb1ce73a72a2cae3fd7f53230a18876a2674dc0ac1f32cdfb1becad","schema_version":"1.0","event_id":"sha256:d105be636bb1ce73a72a2cae3fd7f53230a18876a2674dc0ac1f32cdfb1becad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:TV2PDUNJTKPPSCWSWH42GVHKGW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chaotic dynamics in a quantum Fermi-Pasta-Ulam problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nlin.CD","nlin.SI"],"primary_cat":"cond-mat.dis-nn","authors_text":"Alexander L. Burin, Andrii O. Maksymov, Il'ya Ya. Polishchuk, Ma'ayan Schmidt","submitted_at":"2018-12-20T20:12:34Z","abstract_excerpt":"We investigate the emergence of chaotic dynamics in a quantum Fermi - Pasta - Ulam problem for anharmonic vibrations in atomic chains applying semi-quantitative analysis of resonant interactions complemented by exact diagonalization numerical studies. The crossover energy separating chaotic high energy phase and localized (integrable) low energy phase is estimated. It decreases inversely proportionally to the number of atoms until approaching the quantum regime where this dependence saturates. The chaotic behavior appears at lower energies in systems with free or fixed ends boundary conditions"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.08826","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":"2026-05-17T23:55:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0+ioSzBm8s+/EKYm/m/nHAtBWAYDpFCin+7d2PFJDSRuJBSQNLLm2brmzj8POK+kwjPxUpBQWfuhIlI2vrTICQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:21:31.615745Z"},"content_sha256":"b5ac1031e8b35d0eb19ae993e4f75ef9ac59e36e26794002c16b5fb2c44b73d7","schema_version":"1.0","event_id":"sha256:b5ac1031e8b35d0eb19ae993e4f75ef9ac59e36e26794002c16b5fb2c44b73d7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TV2PDUNJTKPPSCWSWH42GVHKGW/bundle.json","state_url":"https://pith.science/pith/TV2PDUNJTKPPSCWSWH42GVHKGW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TV2PDUNJTKPPSCWSWH42GVHKGW/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":"2026-05-27T17:21:31Z","links":{"resolver":"https://pith.science/pith/TV2PDUNJTKPPSCWSWH42GVHKGW","bundle":"https://pith.science/pith/TV2PDUNJTKPPSCWSWH42GVHKGW/bundle.json","state":"https://pith.science/pith/TV2PDUNJTKPPSCWSWH42GVHKGW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TV2PDUNJTKPPSCWSWH42GVHKGW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:TV2PDUNJTKPPSCWSWH42GVHKGW","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":"c2919093259a51c63513e9a2e32f9b3e4c6848040b539770e64619ffb46b85f4","cross_cats_sorted":["nlin.CD","nlin.SI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.dis-nn","submitted_at":"2018-12-20T20:12:34Z","title_canon_sha256":"627fa213ede690b592d1cb847a98b1e5bdae77e775c644d99240aa0fdf1e952e"},"schema_version":"1.0","source":{"id":"1812.08826","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.08826","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"arxiv_version","alias_value":"1812.08826v1","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.08826","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"pith_short_12","alias_value":"TV2PDUNJTKPP","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"TV2PDUNJTKPPSCWS","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"TV2PDUNJ","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:b5ac1031e8b35d0eb19ae993e4f75ef9ac59e36e26794002c16b5fb2c44b73d7","target":"graph","created_at":"2026-05-17T23:55:10Z","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 investigate the emergence of chaotic dynamics in a quantum Fermi - Pasta - Ulam problem for anharmonic vibrations in atomic chains applying semi-quantitative analysis of resonant interactions complemented by exact diagonalization numerical studies. The crossover energy separating chaotic high energy phase and localized (integrable) low energy phase is estimated. It decreases inversely proportionally to the number of atoms until approaching the quantum regime where this dependence saturates. The chaotic behavior appears at lower energies in systems with free or fixed ends boundary conditions","authors_text":"Alexander L. Burin, Andrii O. Maksymov, Il'ya Ya. Polishchuk, Ma'ayan Schmidt","cross_cats":["nlin.CD","nlin.SI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.dis-nn","submitted_at":"2018-12-20T20:12:34Z","title":"Chaotic dynamics in a quantum Fermi-Pasta-Ulam problem"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.08826","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:d105be636bb1ce73a72a2cae3fd7f53230a18876a2674dc0ac1f32cdfb1becad","target":"record","created_at":"2026-05-17T23:55:10Z","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":"c2919093259a51c63513e9a2e32f9b3e4c6848040b539770e64619ffb46b85f4","cross_cats_sorted":["nlin.CD","nlin.SI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.dis-nn","submitted_at":"2018-12-20T20:12:34Z","title_canon_sha256":"627fa213ede690b592d1cb847a98b1e5bdae77e775c644d99240aa0fdf1e952e"},"schema_version":"1.0","source":{"id":"1812.08826","kind":"arxiv","version":1}},"canonical_sha256":"9d74f1d1a99a9ef90ad2b1f9a354ea35b3d27f7c04b1b734a226a2d4e0aaa194","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d74f1d1a99a9ef90ad2b1f9a354ea35b3d27f7c04b1b734a226a2d4e0aaa194","first_computed_at":"2026-05-17T23:55:10.439117Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:10.439117Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dnUsDxdGrvih+ERbClq887Pv7a3XFck3WZJyt5vqKjwVGihzxoX5o+gEqm45McL8K8mTWU4khqbZR5nrO7oXBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:10.439616Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.08826","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d105be636bb1ce73a72a2cae3fd7f53230a18876a2674dc0ac1f32cdfb1becad","sha256:b5ac1031e8b35d0eb19ae993e4f75ef9ac59e36e26794002c16b5fb2c44b73d7"],"state_sha256":"5448a88db6697b96a3a0c5809ab87425f50344c44da57ddccc2cbc45d76b040b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2avtpVkV8ormfwoNerQ2tnqXT+4Ky6MwYqHQ+Ij0qMYDUHG+XfPpR+8p3AQ3YaddQ3euhorCtUORPmiY4fNfBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T17:21:31.619062Z","bundle_sha256":"7c49420ad96ec45c4acbf8a0ea167735099e86543eb8bb3f5d2af3d99b31c262"}}