{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:TOVBM6OHVO7KOWOVWBCGLTHMPF","short_pith_number":"pith:TOVBM6OH","canonical_record":{"source":{"id":"1507.01117","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-07-04T15:28:37Z","cross_cats_sorted":[],"title_canon_sha256":"c85c6fab1a3f37f6173ca4a04161f533a182b150cbc864b2e2efec1616e11d62","abstract_canon_sha256":"b82e31159e296b4e797c515f15431bbfcdacfbf4801b3c7cabd23387806fd99b"},"schema_version":"1.0"},"canonical_sha256":"9baa1679c7abbea759d5b04465ccec794f985546374e64495423f933d617524a","source":{"kind":"arxiv","id":"1507.01117","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01117","created_at":"2026-05-18T01:26:25Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01117v2","created_at":"2026-05-18T01:26:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01117","created_at":"2026-05-18T01:26:25Z"},{"alias_kind":"pith_short_12","alias_value":"TOVBM6OHVO7K","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TOVBM6OHVO7KOWOV","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TOVBM6OH","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:TOVBM6OHVO7KOWOVWBCGLTHMPF","target":"record","payload":{"canonical_record":{"source":{"id":"1507.01117","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-07-04T15:28:37Z","cross_cats_sorted":[],"title_canon_sha256":"c85c6fab1a3f37f6173ca4a04161f533a182b150cbc864b2e2efec1616e11d62","abstract_canon_sha256":"b82e31159e296b4e797c515f15431bbfcdacfbf4801b3c7cabd23387806fd99b"},"schema_version":"1.0"},"canonical_sha256":"9baa1679c7abbea759d5b04465ccec794f985546374e64495423f933d617524a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:25.155915Z","signature_b64":"7PgoUPUvcRwe/Y7Q0Pkyp6Vm8z8EAnBF0YGAeClUPmTSV6WarOn8+mF/p4ZSu+q0VOr60dMXnMUW/EZmG7UMCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9baa1679c7abbea759d5b04465ccec794f985546374e64495423f933d617524a","last_reissued_at":"2026-05-18T01:26:25.155269Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:25.155269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.01117","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":"2026-05-18T01:26:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OQEpBHodJBSqam51/71+BKxb1nxHcLYZ77xIJkC+a/Av+twT32SAXIMuAOM55J5/27IVSJENs1iBGtt0kiITBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T05:51:24.726040Z"},"content_sha256":"eeb06f5311a58633a8a14e5eb14f85742b63fd233bfb1408b61b5095146188ae","schema_version":"1.0","event_id":"sha256:eeb06f5311a58633a8a14e5eb14f85742b63fd233bfb1408b61b5095146188ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:TOVBM6OHVO7KOWOVWBCGLTHMPF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Antiferromagnetic Heisenberg Spin Chain of a Few Cold Atoms in a One-Dimensional Trap","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Frank Deuretzbacher, Gerhard Z\\\"urn, Johannes Bjerlin, Luis Santos, Selim Jochim, Simon Murmann, Stephanie M. Reimann, Thomas Lompe","submitted_at":"2015-07-04T15:28:37Z","abstract_excerpt":"We report on the deterministic preparation of antiferromagnetic Heisenberg spin chains consisting of up to four fermionic atoms in a one-dimensional trap. These chains are stabilized by strong repulsive interactions between the two spin components without the need for an external periodic potential. We independently characterize the spin configuration of the chains by measuring the spin orientation of the outermost particle in the trap and by projecting the spatial wave function of one spin component on single-particle trap levels. Our results are in good agreement with a spin-chain model for "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01117","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":"2026-05-18T01:26:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A5AJ0OvOYupLleUZSPG8bJYQ3lFMQlVMYqTYr99xMwM25UbCXAAtVwuviQWcSJWOznTaMzONNOnPQeS1FskHDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T05:51:24.726409Z"},"content_sha256":"cea55406fed83b9b0b8ef59584aa6067113161439ae44b458f0956125c4d31d9","schema_version":"1.0","event_id":"sha256:cea55406fed83b9b0b8ef59584aa6067113161439ae44b458f0956125c4d31d9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TOVBM6OHVO7KOWOVWBCGLTHMPF/bundle.json","state_url":"https://pith.science/pith/TOVBM6OHVO7KOWOVWBCGLTHMPF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TOVBM6OHVO7KOWOVWBCGLTHMPF/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":"2026-06-20T05:51:24Z","links":{"resolver":"https://pith.science/pith/TOVBM6OHVO7KOWOVWBCGLTHMPF","bundle":"https://pith.science/pith/TOVBM6OHVO7KOWOVWBCGLTHMPF/bundle.json","state":"https://pith.science/pith/TOVBM6OHVO7KOWOVWBCGLTHMPF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TOVBM6OHVO7KOWOVWBCGLTHMPF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TOVBM6OHVO7KOWOVWBCGLTHMPF","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":"b82e31159e296b4e797c515f15431bbfcdacfbf4801b3c7cabd23387806fd99b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-07-04T15:28:37Z","title_canon_sha256":"c85c6fab1a3f37f6173ca4a04161f533a182b150cbc864b2e2efec1616e11d62"},"schema_version":"1.0","source":{"id":"1507.01117","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01117","created_at":"2026-05-18T01:26:25Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01117v2","created_at":"2026-05-18T01:26:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01117","created_at":"2026-05-18T01:26:25Z"},{"alias_kind":"pith_short_12","alias_value":"TOVBM6OHVO7K","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TOVBM6OHVO7KOWOV","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TOVBM6OH","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:cea55406fed83b9b0b8ef59584aa6067113161439ae44b458f0956125c4d31d9","target":"graph","created_at":"2026-05-18T01:26:25Z","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 report on the deterministic preparation of antiferromagnetic Heisenberg spin chains consisting of up to four fermionic atoms in a one-dimensional trap. These chains are stabilized by strong repulsive interactions between the two spin components without the need for an external periodic potential. We independently characterize the spin configuration of the chains by measuring the spin orientation of the outermost particle in the trap and by projecting the spatial wave function of one spin component on single-particle trap levels. Our results are in good agreement with a spin-chain model for ","authors_text":"Frank Deuretzbacher, Gerhard Z\\\"urn, Johannes Bjerlin, Luis Santos, Selim Jochim, Simon Murmann, Stephanie M. Reimann, Thomas Lompe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-07-04T15:28:37Z","title":"Antiferromagnetic Heisenberg Spin Chain of a Few Cold Atoms in a One-Dimensional Trap"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01117","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:eeb06f5311a58633a8a14e5eb14f85742b63fd233bfb1408b61b5095146188ae","target":"record","created_at":"2026-05-18T01:26:25Z","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":"b82e31159e296b4e797c515f15431bbfcdacfbf4801b3c7cabd23387806fd99b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2015-07-04T15:28:37Z","title_canon_sha256":"c85c6fab1a3f37f6173ca4a04161f533a182b150cbc864b2e2efec1616e11d62"},"schema_version":"1.0","source":{"id":"1507.01117","kind":"arxiv","version":2}},"canonical_sha256":"9baa1679c7abbea759d5b04465ccec794f985546374e64495423f933d617524a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9baa1679c7abbea759d5b04465ccec794f985546374e64495423f933d617524a","first_computed_at":"2026-05-18T01:26:25.155269Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:25.155269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7PgoUPUvcRwe/Y7Q0Pkyp6Vm8z8EAnBF0YGAeClUPmTSV6WarOn8+mF/p4ZSu+q0VOr60dMXnMUW/EZmG7UMCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:25.155915Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.01117","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eeb06f5311a58633a8a14e5eb14f85742b63fd233bfb1408b61b5095146188ae","sha256:cea55406fed83b9b0b8ef59584aa6067113161439ae44b458f0956125c4d31d9"],"state_sha256":"199790c048414789f362a5dbf3ef7d0f3d024ef3ba5e81a8a923824c3b83d737"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SU7nmwYMb/7FviHkcR+gqqavEK+P/zGQOMulJMH1yYwG09xiudMTh3t5MbsI6HU8qLg7PwSPb7dFqoVKeLuiDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T05:51:24.728324Z","bundle_sha256":"7ea3fb888b3cd544a934d56322ce447ffc9984c82dbdda11532d024551b55258"}}