{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3BPGZG5NFYSW7ODOKFYHZBVH42","short_pith_number":"pith:3BPGZG5N","canonical_record":{"source":{"id":"1601.06247","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-23T07:57:51Z","cross_cats_sorted":[],"title_canon_sha256":"3e6ea8c7975b8b7057c32dc0c76c7083015f513692966ce3af9abd61c13417bd","abstract_canon_sha256":"1163aa31215a85453665baa9edece94f5c4f998c0bac20842579439d06cbe0d8"},"schema_version":"1.0"},"canonical_sha256":"d85e6c9bad2e256fb86e51707c86a7e6a7bbc86cc3a46f3ffb991d7382f4f3b0","source":{"kind":"arxiv","id":"1601.06247","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06247","created_at":"2026-05-18T01:13:15Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06247v1","created_at":"2026-05-18T01:13:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06247","created_at":"2026-05-18T01:13:15Z"},{"alias_kind":"pith_short_12","alias_value":"3BPGZG5NFYSW","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3BPGZG5NFYSW7ODO","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3BPGZG5N","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3BPGZG5NFYSW7ODOKFYHZBVH42","target":"record","payload":{"canonical_record":{"source":{"id":"1601.06247","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-23T07:57:51Z","cross_cats_sorted":[],"title_canon_sha256":"3e6ea8c7975b8b7057c32dc0c76c7083015f513692966ce3af9abd61c13417bd","abstract_canon_sha256":"1163aa31215a85453665baa9edece94f5c4f998c0bac20842579439d06cbe0d8"},"schema_version":"1.0"},"canonical_sha256":"d85e6c9bad2e256fb86e51707c86a7e6a7bbc86cc3a46f3ffb991d7382f4f3b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:15.533790Z","signature_b64":"5UCJxW3UvdoD0CXQS+r9zZkZI62NPb8uskmveh0Um1+oQTyXghRzC0bzXH1Ljna2MPDA0dIuTFYCmdQznyKdCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d85e6c9bad2e256fb86e51707c86a7e6a7bbc86cc3a46f3ffb991d7382f4f3b0","last_reissued_at":"2026-05-18T01:13:15.533254Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:15.533254Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.06247","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":"2026-05-18T01:13:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0gQsEXgYiUyd0r820SEuxi0uwhlooweQLjBvtbJH5aL3x5UB7P1PoM4U5j7CvpcxTWZjZOlCpC1VcYqlOf5wAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T05:12:17.731605Z"},"content_sha256":"68ce45fb3933a6d51a62839091625cf97096ecd5efd891dee2b9b9e69865f5f4","schema_version":"1.0","event_id":"sha256:68ce45fb3933a6d51a62839091625cf97096ecd5efd891dee2b9b9e69865f5f4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3BPGZG5NFYSW7ODOKFYHZBVH42","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental observation of topological transitions in interacting multi-spin systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Chao Lei, Jiangfeng Du, Jun Li, Xinfang Nie, Xinhua Peng, Zhaokai Li, Zhihuang Luo","submitted_at":"2016-01-23T07:57:51Z","abstract_excerpt":"Topologically ordered phase has emerged as one of most exciting concepts that not only broadens our understanding of phases of matter, but also has been found to have potential application in fault-tolerant quantum computation. The direct measurement of topological properties, however, is still a challenge especially in interacting quantum system. Here we realize one-dimensional Heisenberg spin chains using nuclear magnetic resonance simulators and observe the interaction-induced topological transitions, where Berry curvature in the parameter space of Hamiltonian is probed by means of dynamica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06247","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":"2026-05-18T01:13:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"svZk6qv+5ozELEjKgyKBIW4+mAaiNq0WnyW9fxNJNSLqifpRd0z35RMnhs9ZYOz3PvbTj3D92MpgpWf6fT10AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T05:12:17.732335Z"},"content_sha256":"fbb131adc03ffa065f233492bfe1767eb3fa9a5eb284945fc1318938bf097f81","schema_version":"1.0","event_id":"sha256:fbb131adc03ffa065f233492bfe1767eb3fa9a5eb284945fc1318938bf097f81"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3BPGZG5NFYSW7ODOKFYHZBVH42/bundle.json","state_url":"https://pith.science/pith/3BPGZG5NFYSW7ODOKFYHZBVH42/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3BPGZG5NFYSW7ODOKFYHZBVH42/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":"2026-05-31T05:12:17Z","links":{"resolver":"https://pith.science/pith/3BPGZG5NFYSW7ODOKFYHZBVH42","bundle":"https://pith.science/pith/3BPGZG5NFYSW7ODOKFYHZBVH42/bundle.json","state":"https://pith.science/pith/3BPGZG5NFYSW7ODOKFYHZBVH42/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3BPGZG5NFYSW7ODOKFYHZBVH42/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3BPGZG5NFYSW7ODOKFYHZBVH42","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":"1163aa31215a85453665baa9edece94f5c4f998c0bac20842579439d06cbe0d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-23T07:57:51Z","title_canon_sha256":"3e6ea8c7975b8b7057c32dc0c76c7083015f513692966ce3af9abd61c13417bd"},"schema_version":"1.0","source":{"id":"1601.06247","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06247","created_at":"2026-05-18T01:13:15Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06247v1","created_at":"2026-05-18T01:13:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06247","created_at":"2026-05-18T01:13:15Z"},{"alias_kind":"pith_short_12","alias_value":"3BPGZG5NFYSW","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3BPGZG5NFYSW7ODO","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3BPGZG5N","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:fbb131adc03ffa065f233492bfe1767eb3fa9a5eb284945fc1318938bf097f81","target":"graph","created_at":"2026-05-18T01:13:15Z","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":"Topologically ordered phase has emerged as one of most exciting concepts that not only broadens our understanding of phases of matter, but also has been found to have potential application in fault-tolerant quantum computation. The direct measurement of topological properties, however, is still a challenge especially in interacting quantum system. Here we realize one-dimensional Heisenberg spin chains using nuclear magnetic resonance simulators and observe the interaction-induced topological transitions, where Berry curvature in the parameter space of Hamiltonian is probed by means of dynamica","authors_text":"Chao Lei, Jiangfeng Du, Jun Li, Xinfang Nie, Xinhua Peng, Zhaokai Li, Zhihuang Luo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-23T07:57:51Z","title":"Experimental observation of topological transitions in interacting multi-spin systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06247","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":"sha256:68ce45fb3933a6d51a62839091625cf97096ecd5efd891dee2b9b9e69865f5f4","target":"record","created_at":"2026-05-18T01:13:15Z","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":"1163aa31215a85453665baa9edece94f5c4f998c0bac20842579439d06cbe0d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-23T07:57:51Z","title_canon_sha256":"3e6ea8c7975b8b7057c32dc0c76c7083015f513692966ce3af9abd61c13417bd"},"schema_version":"1.0","source":{"id":"1601.06247","kind":"arxiv","version":1}},"canonical_sha256":"d85e6c9bad2e256fb86e51707c86a7e6a7bbc86cc3a46f3ffb991d7382f4f3b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d85e6c9bad2e256fb86e51707c86a7e6a7bbc86cc3a46f3ffb991d7382f4f3b0","first_computed_at":"2026-05-18T01:13:15.533254Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:15.533254Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5UCJxW3UvdoD0CXQS+r9zZkZI62NPb8uskmveh0Um1+oQTyXghRzC0bzXH1Ljna2MPDA0dIuTFYCmdQznyKdCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:15.533790Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.06247","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:68ce45fb3933a6d51a62839091625cf97096ecd5efd891dee2b9b9e69865f5f4","sha256:fbb131adc03ffa065f233492bfe1767eb3fa9a5eb284945fc1318938bf097f81"],"state_sha256":"dc6a2454fdbe3745387b527c96e7e264fcd83f9b3dc39588b14dc1380af5b94f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qk5AuxKNBA4ccUb7+44XN1kZ9Z6uNKiUu8mCPeEyzRBN5+dByJtdzNOm1PF8kBArFg1FGqvv1Jfl9ojLsEtmBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T05:12:17.736279Z","bundle_sha256":"745a71e66ec9eab21aeae376a57e8df40c0f952ea52953646a67641e88aa5d9e"}}