{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:T2PJR3ONFW4Z3HYZROV27NTLWS","short_pith_number":"pith:T2PJR3ON","canonical_record":{"source":{"id":"1101.5895","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-01-31T10:16:02Z","cross_cats_sorted":[],"title_canon_sha256":"da53b0bb2c44adaa1ae51cde62cea356c77c2c3033d52e58b6f3c68d004c908f","abstract_canon_sha256":"08fac31bee2169b22d37e89fc8788e57b5c8c8964452ed4cfbec51a3e54e74f5"},"schema_version":"1.0"},"canonical_sha256":"9e9e98edcd2db99d9f198babafb66bb489206ac91982081e52a83405496a0e4a","source":{"kind":"arxiv","id":"1101.5895","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.5895","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"arxiv_version","alias_value":"1101.5895v1","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.5895","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"pith_short_12","alias_value":"T2PJR3ONFW4Z","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"T2PJR3ONFW4Z3HYZ","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"T2PJR3ON","created_at":"2026-05-18T12:26:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:T2PJR3ONFW4Z3HYZROV27NTLWS","target":"record","payload":{"canonical_record":{"source":{"id":"1101.5895","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-01-31T10:16:02Z","cross_cats_sorted":[],"title_canon_sha256":"da53b0bb2c44adaa1ae51cde62cea356c77c2c3033d52e58b6f3c68d004c908f","abstract_canon_sha256":"08fac31bee2169b22d37e89fc8788e57b5c8c8964452ed4cfbec51a3e54e74f5"},"schema_version":"1.0"},"canonical_sha256":"9e9e98edcd2db99d9f198babafb66bb489206ac91982081e52a83405496a0e4a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:21:52.773096Z","signature_b64":"/frmXm4PN0/qwJ594hpyFTdOW+ZegqBIr8K2D7qKtno9eabYyAvVOfDUQaQ1c4RqXB7OQuXrcIF1AzkLY7JLBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9e9e98edcd2db99d9f198babafb66bb489206ac91982081e52a83405496a0e4a","last_reissued_at":"2026-05-18T04:21:52.772433Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:21:52.772433Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.5895","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":"2026-05-18T04:21:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4Dsg12qTLXd6lhQkAeBCLRjbgIgyZ6zZVp9jK3NkmzeBsEHMFmn9LKXJPZoaAFxyXJdMXVnIhcZtpHmJMxcuCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:02:18.566229Z"},"content_sha256":"2907bd904450bc0e4b0078a2886a4632830de4e002cfbdd1e60e4e45d45c3073","schema_version":"1.0","event_id":"sha256:2907bd904450bc0e4b0078a2886a4632830de4e002cfbdd1e60e4e45d45c3073"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:T2PJR3ONFW4Z3HYZROV27NTLWS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chebyshev matrix product state approach for spectral functions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Andreas Holzner, Andreas Weichselbaum, Ian P. McCulloch, Jan von Delft, Ulrich Schollw\\\"ock","submitted_at":"2011-01-31T10:16:02Z","abstract_excerpt":"We show that recursively generated Chebyshev expansions offer numerically efficient representations for calculating zero-temperature spectral functions of one-dimensional lattice models using matrix product state (MPS) methods. The main features of this Chebychev matrix product state (CheMPS) approach are: (i) it achieves uniform resolution over the spectral function's entire spectral width; (ii) it can exploit the fact that the latter can be much smaller than the model's many-body bandwidth; (iii) it offers a well-controlled broadening scheme; (iv) it is based on a succession of Chebychev vec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.5895","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":"2026-05-18T04:21:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FFFQD0OX5CEPkOL6/6bLQeTYRRlgndQuzSM/BNhKhSTSYL2fB8GGQCigwuVOz08sNFuWmBgEknFal41mzguqAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:02:18.566814Z"},"content_sha256":"065b492fa91ee2f32ece298ca66bd2a9e24971b5432061045e583cd80364d12c","schema_version":"1.0","event_id":"sha256:065b492fa91ee2f32ece298ca66bd2a9e24971b5432061045e583cd80364d12c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T2PJR3ONFW4Z3HYZROV27NTLWS/bundle.json","state_url":"https://pith.science/pith/T2PJR3ONFW4Z3HYZROV27NTLWS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T2PJR3ONFW4Z3HYZROV27NTLWS/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":"2026-05-27T07:02:18Z","links":{"resolver":"https://pith.science/pith/T2PJR3ONFW4Z3HYZROV27NTLWS","bundle":"https://pith.science/pith/T2PJR3ONFW4Z3HYZROV27NTLWS/bundle.json","state":"https://pith.science/pith/T2PJR3ONFW4Z3HYZROV27NTLWS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T2PJR3ONFW4Z3HYZROV27NTLWS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:T2PJR3ONFW4Z3HYZROV27NTLWS","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":"08fac31bee2169b22d37e89fc8788e57b5c8c8964452ed4cfbec51a3e54e74f5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-01-31T10:16:02Z","title_canon_sha256":"da53b0bb2c44adaa1ae51cde62cea356c77c2c3033d52e58b6f3c68d004c908f"},"schema_version":"1.0","source":{"id":"1101.5895","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.5895","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"arxiv_version","alias_value":"1101.5895v1","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.5895","created_at":"2026-05-18T04:21:52Z"},{"alias_kind":"pith_short_12","alias_value":"T2PJR3ONFW4Z","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"T2PJR3ONFW4Z3HYZ","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"T2PJR3ON","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:065b492fa91ee2f32ece298ca66bd2a9e24971b5432061045e583cd80364d12c","target":"graph","created_at":"2026-05-18T04:21:52Z","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 show that recursively generated Chebyshev expansions offer numerically efficient representations for calculating zero-temperature spectral functions of one-dimensional lattice models using matrix product state (MPS) methods. The main features of this Chebychev matrix product state (CheMPS) approach are: (i) it achieves uniform resolution over the spectral function's entire spectral width; (ii) it can exploit the fact that the latter can be much smaller than the model's many-body bandwidth; (iii) it offers a well-controlled broadening scheme; (iv) it is based on a succession of Chebychev vec","authors_text":"Andreas Holzner, Andreas Weichselbaum, Ian P. McCulloch, Jan von Delft, Ulrich Schollw\\\"ock","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-01-31T10:16:02Z","title":"Chebyshev matrix product state approach for spectral functions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.5895","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":"sha256:2907bd904450bc0e4b0078a2886a4632830de4e002cfbdd1e60e4e45d45c3073","target":"record","created_at":"2026-05-18T04:21:52Z","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":"08fac31bee2169b22d37e89fc8788e57b5c8c8964452ed4cfbec51a3e54e74f5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-01-31T10:16:02Z","title_canon_sha256":"da53b0bb2c44adaa1ae51cde62cea356c77c2c3033d52e58b6f3c68d004c908f"},"schema_version":"1.0","source":{"id":"1101.5895","kind":"arxiv","version":1}},"canonical_sha256":"9e9e98edcd2db99d9f198babafb66bb489206ac91982081e52a83405496a0e4a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9e9e98edcd2db99d9f198babafb66bb489206ac91982081e52a83405496a0e4a","first_computed_at":"2026-05-18T04:21:52.772433Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:52.772433Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/frmXm4PN0/qwJ594hpyFTdOW+ZegqBIr8K2D7qKtno9eabYyAvVOfDUQaQ1c4RqXB7OQuXrcIF1AzkLY7JLBA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:52.773096Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.5895","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2907bd904450bc0e4b0078a2886a4632830de4e002cfbdd1e60e4e45d45c3073","sha256:065b492fa91ee2f32ece298ca66bd2a9e24971b5432061045e583cd80364d12c"],"state_sha256":"b09980245c75f51f2f77068f272f0a467c1aae69d92a6623d18a2c064e351c37"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H8fQ8Vrm8/5dkgGHAa0QbxpfSi9Gep+aj8B25DEa/rcHMh3g/kWFRSmrjzGVRXQFnrqMO8tAISUea86uf57TAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T07:02:18.570052Z","bundle_sha256":"2c0cf1c13beaafd27b54247ae9099207bc8d22bff73def3cd28239d33454d8a2"}}