{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:4472IPCDYHEXGZBODV2BIPUVJX","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":"2db6d20cf27720659bf4e8addf803b516ef4c3974fcb62d551c985ad069421c6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-08-13T14:41:16Z","title_canon_sha256":"297455cdbb110f8cb03eef6224ae1e26ea3325908b5fe8919e6966e1692256eb"},"schema_version":"1.0","source":{"id":"1308.2882","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.2882","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"arxiv_version","alias_value":"1308.2882v2","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.2882","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"pith_short_12","alias_value":"4472IPCDYHEX","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"4472IPCDYHEXGZBO","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"4472IPCD","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:4497c4c918855896697b36c1c9c6e9c846675bb522fa9fa533d11d4c36e1845b","target":"graph","created_at":"2026-05-18T02:48:01Z","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":"Spin-polarized scanning tunneling microscopy is identified as a suitable experimental technique to investigate the quantitative quality of Lieb-Robinson bounds on the signal velocity. The latest, most general bound is simplified and it is shown that there is a discrepancy by a factor of approximately 4 between the corresponding limit speed and some estimated exact velocities in atomic spin chains. The observed discrepancy facilitates conclusions for a further mathematical improvement of Lieb-Robinson bounds. The real signal propagation can be modified with several experimental parameters from ","authors_text":"Kolja Them","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-08-13T14:41:16Z","title":"Towards experimental tests and applications of Lieb-Robinson bounds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.2882","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:c62a657ef68bbfa749050fd9c7e65b880ebf61967bd9dd5c1b92b2d0379d6c48","target":"record","created_at":"2026-05-18T02:48:01Z","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":"2db6d20cf27720659bf4e8addf803b516ef4c3974fcb62d551c985ad069421c6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-08-13T14:41:16Z","title_canon_sha256":"297455cdbb110f8cb03eef6224ae1e26ea3325908b5fe8919e6966e1692256eb"},"schema_version":"1.0","source":{"id":"1308.2882","kind":"arxiv","version":2}},"canonical_sha256":"e73fa43c43c1c973642e1d74143e954de44e3a2b2c4e09b504288ca24cccf5e1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e73fa43c43c1c973642e1d74143e954de44e3a2b2c4e09b504288ca24cccf5e1","first_computed_at":"2026-05-18T02:48:01.068366Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:48:01.068366Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dyTQmhOgLtqpWEBYtQvjUc8g2a1MSEV2P71yEZrsNOgWIPZwpD96enSAhM7+ok02zVI17vG8nZC6p4NNhXQFCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:48:01.068824Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.2882","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c62a657ef68bbfa749050fd9c7e65b880ebf61967bd9dd5c1b92b2d0379d6c48","sha256:4497c4c918855896697b36c1c9c6e9c846675bb522fa9fa533d11d4c36e1845b"],"state_sha256":"9c0d975550901334b0df5ea7d0d0384255888fd7fee943e081a97f11d200b40b"}