{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:NYO5SEWE7FAVXPLSWR62GEQ5KT","short_pith_number":"pith:NYO5SEWE","canonical_record":{"source":{"id":"cond-mat/9802168","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-02-16T12:27:27Z","cross_cats_sorted":[],"title_canon_sha256":"1447c67277b2d9b6bd106c5e4f95e77680fee89b15552d9a18fde83ae769f00e","abstract_canon_sha256":"5d46c1bcc40590791c8d15eacf8ddfbb68bce7626223cdcef8bee29fb20559e9"},"schema_version":"1.0"},"canonical_sha256":"6e1dd912c4f9415bbd72b47da3121d54dce668a0b026f25fcbdc9cb3c89f3925","source":{"kind":"arxiv","id":"cond-mat/9802168","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9802168","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9802168v1","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9802168","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"pith_short_12","alias_value":"NYO5SEWE7FAV","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"pith_short_16","alias_value":"NYO5SEWE7FAVXPLS","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"pith_short_8","alias_value":"NYO5SEWE","created_at":"2026-07-04T16:07:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:NYO5SEWE7FAVXPLSWR62GEQ5KT","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9802168","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-02-16T12:27:27Z","cross_cats_sorted":[],"title_canon_sha256":"1447c67277b2d9b6bd106c5e4f95e77680fee89b15552d9a18fde83ae769f00e","abstract_canon_sha256":"5d46c1bcc40590791c8d15eacf8ddfbb68bce7626223cdcef8bee29fb20559e9"},"schema_version":"1.0"},"canonical_sha256":"6e1dd912c4f9415bbd72b47da3121d54dce668a0b026f25fcbdc9cb3c89f3925","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:07:35.940918Z","signature_b64":"ZMK36BXPxBFpzTV9KjNz25l8JgWX1c6IKaSTAWbsvaWIdX14ysGYqDpIemgxt4PQGOZuamItxzq5RdBxbt43DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6e1dd912c4f9415bbd72b47da3121d54dce668a0b026f25fcbdc9cb3c89f3925","last_reissued_at":"2026-07-04T16:07:35.940499Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:07:35.940499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9802168","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":"2026-07-04T16:07:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jLGMsfzkm2XGLxSyC2bIPJEIWRG2wmwYBfK0SHYdnTaqzNpSOl3HXM6LruyNYQBuTN0PSFyt5RsPG5eYKPk5Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T00:53:26.724549Z"},"content_sha256":"13e061692b7264cd9d98b87f4b210bc903454bdbea45408b97a80374b6519fc1","schema_version":"1.0","event_id":"sha256:13e061692b7264cd9d98b87f4b210bc903454bdbea45408b97a80374b6519fc1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:NYO5SEWE7FAVXPLSWR62GEQ5KT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First excitations of the spin 1/2 Heisenberg antiferromagnet on the kagom\\'e lattice","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"B. Bernu, Ch. Waldtmann, C. Lhuillier, H. -U. Everts, L. Pierre, P. Lecheminant, P. Sindzingre","submitted_at":"1998-02-16T12:27:27Z","abstract_excerpt":"We study the exact low energy spectra of the spin 1/2 Heisenberg antiferromagnet on small samples of the kagom\\'e lattice of up to N=36 sites. In agreement with the conclusions of previous authors, we find that these low energy spectra contradict the hypothesis of N\\'eel type long range order. Certainly, the ground state of this system is a spin liquid, but its properties are rather unusual. The magnetic ($\\Delta S=1$) excitations are separated from the ground state by a gap. However, this gap is filled with nonmagnetic ($\\Delta S=0$) excitations. In the thermodynamic limit the spectrum of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9802168","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/cond-mat/9802168/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:07:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y+8jm9DcpD9C/hb/LPkl34s/7KDlw0xLX8Tt9fPvNFE2JC3eAZ+Dhft5SzZOtwgzJjljNtSq2wX31CplRkz2Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T00:53:26.724921Z"},"content_sha256":"a4a9e139f2edd8adb049602c909baaa740ebcd167b3023f1c4d8e2f4a6ec98e3","schema_version":"1.0","event_id":"sha256:a4a9e139f2edd8adb049602c909baaa740ebcd167b3023f1c4d8e2f4a6ec98e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NYO5SEWE7FAVXPLSWR62GEQ5KT/bundle.json","state_url":"https://pith.science/pith/NYO5SEWE7FAVXPLSWR62GEQ5KT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NYO5SEWE7FAVXPLSWR62GEQ5KT/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":"2026-07-25T00:53:26Z","links":{"resolver":"https://pith.science/pith/NYO5SEWE7FAVXPLSWR62GEQ5KT","bundle":"https://pith.science/pith/NYO5SEWE7FAVXPLSWR62GEQ5KT/bundle.json","state":"https://pith.science/pith/NYO5SEWE7FAVXPLSWR62GEQ5KT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NYO5SEWE7FAVXPLSWR62GEQ5KT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:NYO5SEWE7FAVXPLSWR62GEQ5KT","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":"5d46c1bcc40590791c8d15eacf8ddfbb68bce7626223cdcef8bee29fb20559e9","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-02-16T12:27:27Z","title_canon_sha256":"1447c67277b2d9b6bd106c5e4f95e77680fee89b15552d9a18fde83ae769f00e"},"schema_version":"1.0","source":{"id":"cond-mat/9802168","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9802168","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9802168v1","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9802168","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"pith_short_12","alias_value":"NYO5SEWE7FAV","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"pith_short_16","alias_value":"NYO5SEWE7FAVXPLS","created_at":"2026-07-04T16:07:35Z"},{"alias_kind":"pith_short_8","alias_value":"NYO5SEWE","created_at":"2026-07-04T16:07:35Z"}],"graph_snapshots":[{"event_id":"sha256:a4a9e139f2edd8adb049602c909baaa740ebcd167b3023f1c4d8e2f4a6ec98e3","target":"graph","created_at":"2026-07-04T16:07:35Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/cond-mat/9802168/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the exact low energy spectra of the spin 1/2 Heisenberg antiferromagnet on small samples of the kagom\\'e lattice of up to N=36 sites. In agreement with the conclusions of previous authors, we find that these low energy spectra contradict the hypothesis of N\\'eel type long range order. Certainly, the ground state of this system is a spin liquid, but its properties are rather unusual. The magnetic ($\\Delta S=1$) excitations are separated from the ground state by a gap. However, this gap is filled with nonmagnetic ($\\Delta S=0$) excitations. In the thermodynamic limit the spectrum of the","authors_text":"B. Bernu, Ch. Waldtmann, C. Lhuillier, H. -U. Everts, L. Pierre, P. Lecheminant, P. Sindzingre","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-02-16T12:27:27Z","title":"First excitations of the spin 1/2 Heisenberg antiferromagnet on the kagom\\'e lattice"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9802168","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":"sha256:13e061692b7264cd9d98b87f4b210bc903454bdbea45408b97a80374b6519fc1","target":"record","created_at":"2026-07-04T16:07:35Z","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":"5d46c1bcc40590791c8d15eacf8ddfbb68bce7626223cdcef8bee29fb20559e9","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.stat-mech","submitted_at":"1998-02-16T12:27:27Z","title_canon_sha256":"1447c67277b2d9b6bd106c5e4f95e77680fee89b15552d9a18fde83ae769f00e"},"schema_version":"1.0","source":{"id":"cond-mat/9802168","kind":"arxiv","version":1}},"canonical_sha256":"6e1dd912c4f9415bbd72b47da3121d54dce668a0b026f25fcbdc9cb3c89f3925","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6e1dd912c4f9415bbd72b47da3121d54dce668a0b026f25fcbdc9cb3c89f3925","first_computed_at":"2026-07-04T16:07:35.940499Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:07:35.940499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZMK36BXPxBFpzTV9KjNz25l8JgWX1c6IKaSTAWbsvaWIdX14ysGYqDpIemgxt4PQGOZuamItxzq5RdBxbt43DA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:07:35.940918Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9802168","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13e061692b7264cd9d98b87f4b210bc903454bdbea45408b97a80374b6519fc1","sha256:a4a9e139f2edd8adb049602c909baaa740ebcd167b3023f1c4d8e2f4a6ec98e3"],"state_sha256":"601f3e74763a241be0e9e7e18f43f269922fb500cf8d860e5b417581416784a3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wS2ClWXhl+CXJwSRe9KjB8UKwhl5gTMP9MfG0cRGaOwD3iF8FFVxUr4qhg8iJ0NTXOPxt/GRPSqvyPVs9f7uAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-25T00:53:26.727394Z","bundle_sha256":"f729db8c424ac8433cb473df5d257dbe25468e85b6390550200dd8a0669c53fc"}}