{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:I6W7AALZJIU266DSXWXTIEKGAV","short_pith_number":"pith:I6W7AALZ","canonical_record":{"source":{"id":"1804.05028","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-13T16:59:16Z","cross_cats_sorted":[],"title_canon_sha256":"43bb27643e84cd291bc3c9cfb08097660f4692ea0ce75fbc6ef42fb97f76e7a1","abstract_canon_sha256":"0c942a2ff284b3db7dae543966aad9158b6c6402a8042cdd5ff26f4eb0434a8f"},"schema_version":"1.0"},"canonical_sha256":"47adf001794a29af7872bdaf341146056476ed1143b74eac3cfea259e321b996","source":{"kind":"arxiv","id":"1804.05028","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.05028","created_at":"2026-05-18T00:04:07Z"},{"alias_kind":"arxiv_version","alias_value":"1804.05028v2","created_at":"2026-05-18T00:04:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05028","created_at":"2026-05-18T00:04:07Z"},{"alias_kind":"pith_short_12","alias_value":"I6W7AALZJIU2","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"I6W7AALZJIU266DS","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"I6W7AALZ","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:I6W7AALZJIU266DSXWXTIEKGAV","target":"record","payload":{"canonical_record":{"source":{"id":"1804.05028","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-13T16:59:16Z","cross_cats_sorted":[],"title_canon_sha256":"43bb27643e84cd291bc3c9cfb08097660f4692ea0ce75fbc6ef42fb97f76e7a1","abstract_canon_sha256":"0c942a2ff284b3db7dae543966aad9158b6c6402a8042cdd5ff26f4eb0434a8f"},"schema_version":"1.0"},"canonical_sha256":"47adf001794a29af7872bdaf341146056476ed1143b74eac3cfea259e321b996","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:07.762139Z","signature_b64":"aQKG6Lirq7HthJb+m5bmECR9N9f8CJVBzqc2n548EtzZh1GWOLp5KK/Q9f3znMrPt6rFPyOMbc1xySfy9YN6Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47adf001794a29af7872bdaf341146056476ed1143b74eac3cfea259e321b996","last_reissued_at":"2026-05-18T00:04:07.761545Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:07.761545Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.05028","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":"2026-05-18T00:04:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rXR5JXqLqvfMjQiMMtatiUt9Y9+U3E2D8O9H/oWjeHI58bz7DJSO9V5JG6TgwgSf6GS77Ak7FqkGgdvW0Jm0BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:09:14.545401Z"},"content_sha256":"e99c8684e43ef0c14d5ab5ea9c587820175d5df17087f52efd6b9c25f952bfe0","schema_version":"1.0","event_id":"sha256:e99c8684e43ef0c14d5ab5ea9c587820175d5df17087f52efd6b9c25f952bfe0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:I6W7AALZJIU266DSXWXTIEKGAV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sublattice Coding Algorithm and Distributed Memory Parallelization for Large-Scale Exact Diagonalizations of Quantum Many-Body Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Alexander Wietek, Andreas M. L\\\"auchli","submitted_at":"2018-04-13T16:59:16Z","abstract_excerpt":"We present algorithmic improvements for fast and memory-efficient use of discrete spatial symmetries in Exact Diagonalization computations of quantum many-body systems. These techniques allow us to work flexibly in the reduced basis of symmetry-adapted wave functions. Moreover, a parallelization scheme for the Hamiltonian-vector multiplication in the Lanczos procedure for distributed memory machines avoiding load balancing problems is proposed. We demonstrate that using these methods low-energy properties of systems of up to 50 spin-1/2 particles can be successfully determined."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05028","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":"2026-05-18T00:04:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pw88VXQ2pyEJ3Rw6poqVU1BHybyEIIZ07FX32zi2Xv4PxxVDeXggGFhk6SnKb5f91bY6O1nN6E5T1EPeoC8nCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T17:09:14.545869Z"},"content_sha256":"3c4e2e497a1c2e1386c0eac3cd803e210485e95ac1767636be88a37b223a0b7e","schema_version":"1.0","event_id":"sha256:3c4e2e497a1c2e1386c0eac3cd803e210485e95ac1767636be88a37b223a0b7e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I6W7AALZJIU266DSXWXTIEKGAV/bundle.json","state_url":"https://pith.science/pith/I6W7AALZJIU266DSXWXTIEKGAV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I6W7AALZJIU266DSXWXTIEKGAV/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":"2026-08-04T17:09:14Z","links":{"resolver":"https://pith.science/pith/I6W7AALZJIU266DSXWXTIEKGAV","bundle":"https://pith.science/pith/I6W7AALZJIU266DSXWXTIEKGAV/bundle.json","state":"https://pith.science/pith/I6W7AALZJIU266DSXWXTIEKGAV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I6W7AALZJIU266DSXWXTIEKGAV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:I6W7AALZJIU266DSXWXTIEKGAV","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":"0c942a2ff284b3db7dae543966aad9158b6c6402a8042cdd5ff26f4eb0434a8f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-13T16:59:16Z","title_canon_sha256":"43bb27643e84cd291bc3c9cfb08097660f4692ea0ce75fbc6ef42fb97f76e7a1"},"schema_version":"1.0","source":{"id":"1804.05028","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.05028","created_at":"2026-05-18T00:04:07Z"},{"alias_kind":"arxiv_version","alias_value":"1804.05028v2","created_at":"2026-05-18T00:04:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05028","created_at":"2026-05-18T00:04:07Z"},{"alias_kind":"pith_short_12","alias_value":"I6W7AALZJIU2","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"I6W7AALZJIU266DS","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"I6W7AALZ","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:3c4e2e497a1c2e1386c0eac3cd803e210485e95ac1767636be88a37b223a0b7e","target":"graph","created_at":"2026-05-18T00:04:07Z","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 present algorithmic improvements for fast and memory-efficient use of discrete spatial symmetries in Exact Diagonalization computations of quantum many-body systems. These techniques allow us to work flexibly in the reduced basis of symmetry-adapted wave functions. Moreover, a parallelization scheme for the Hamiltonian-vector multiplication in the Lanczos procedure for distributed memory machines avoiding load balancing problems is proposed. We demonstrate that using these methods low-energy properties of systems of up to 50 spin-1/2 particles can be successfully determined.","authors_text":"Alexander Wietek, Andreas M. L\\\"auchli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-13T16:59:16Z","title":"Sublattice Coding Algorithm and Distributed Memory Parallelization for Large-Scale Exact Diagonalizations of Quantum Many-Body Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05028","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:e99c8684e43ef0c14d5ab5ea9c587820175d5df17087f52efd6b9c25f952bfe0","target":"record","created_at":"2026-05-18T00:04:07Z","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":"0c942a2ff284b3db7dae543966aad9158b6c6402a8042cdd5ff26f4eb0434a8f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-04-13T16:59:16Z","title_canon_sha256":"43bb27643e84cd291bc3c9cfb08097660f4692ea0ce75fbc6ef42fb97f76e7a1"},"schema_version":"1.0","source":{"id":"1804.05028","kind":"arxiv","version":2}},"canonical_sha256":"47adf001794a29af7872bdaf341146056476ed1143b74eac3cfea259e321b996","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47adf001794a29af7872bdaf341146056476ed1143b74eac3cfea259e321b996","first_computed_at":"2026-05-18T00:04:07.761545Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:07.761545Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aQKG6Lirq7HthJb+m5bmECR9N9f8CJVBzqc2n548EtzZh1GWOLp5KK/Q9f3znMrPt6rFPyOMbc1xySfy9YN6Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:07.762139Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.05028","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e99c8684e43ef0c14d5ab5ea9c587820175d5df17087f52efd6b9c25f952bfe0","sha256:3c4e2e497a1c2e1386c0eac3cd803e210485e95ac1767636be88a37b223a0b7e"],"state_sha256":"9207e706a658d227f80c987a394edf926075d702f52e69c32f72e73890397b56"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m9AByV/9wm3Fk9JyAluz1rcS2Jr01LkcJg6IFINVmfuJmV40Gf9r6yhTCTu51uGAfA3GAu0LqRylv3HNLY8mAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T17:09:14.563327Z","bundle_sha256":"97c1e098c9a4cf994a7f1681a491ac2250b966420bd0e522dbf145289c979b9d"}}