{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:FQTJETFA5A3IJRUBERA3BZIIVY","short_pith_number":"pith:FQTJETFA","canonical_record":{"source":{"id":"2101.06385","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2021-01-16T06:55:20Z","cross_cats_sorted":["cond-mat.mtrl-sci","quant-ph"],"title_canon_sha256":"8ec9b26006aa82ad064096e24bd1a6796cfd6389039ca6d42ff845185d3aa119","abstract_canon_sha256":"3235c1cbb2fe0908be967cc61aeb3eb039135d51be8821a18744e533ef0ea44a"},"schema_version":"1.0"},"canonical_sha256":"2c26924ca0e83684c6812441b0e508ae27336360d2ae5c8dc179e3ba984c452f","source":{"kind":"arxiv","id":"2101.06385","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.06385","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"arxiv_version","alias_value":"2101.06385v1","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.06385","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"pith_short_12","alias_value":"FQTJETFA5A3I","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"pith_short_16","alias_value":"FQTJETFA5A3IJRUB","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"pith_short_8","alias_value":"FQTJETFA","created_at":"2026-07-05T02:55:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:FQTJETFA5A3IJRUBERA3BZIIVY","target":"record","payload":{"canonical_record":{"source":{"id":"2101.06385","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2021-01-16T06:55:20Z","cross_cats_sorted":["cond-mat.mtrl-sci","quant-ph"],"title_canon_sha256":"8ec9b26006aa82ad064096e24bd1a6796cfd6389039ca6d42ff845185d3aa119","abstract_canon_sha256":"3235c1cbb2fe0908be967cc61aeb3eb039135d51be8821a18744e533ef0ea44a"},"schema_version":"1.0"},"canonical_sha256":"2c26924ca0e83684c6812441b0e508ae27336360d2ae5c8dc179e3ba984c452f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:55:53.730297Z","signature_b64":"fV4vF2kuGjH/o0PF3omHpkjnRaoV1AO8RUQWzO9nK0c/CUHJO3ny7i/GvUIUCtCJUAAp5Q7523WKEE2A6RZrCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2c26924ca0e83684c6812441b0e508ae27336360d2ae5c8dc179e3ba984c452f","last_reissued_at":"2026-07-05T02:55:53.729959Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:55:53.729959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.06385","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":"2026-07-05T02:55:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GL0aLIGLpCk5I7AlOjUDljgC4435J0CQJJrY94xrhTegDcA3Nf3c/mkQbN2PQxQAkR7qFKTbh0ta3SIWZA+bBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T00:08:49.883641Z"},"content_sha256":"3e5abf0182f179ac06deb361a88d2e388bfb8bb0225969e3ce25e738b82fd40c","schema_version":"1.0","event_id":"sha256:3e5abf0182f179ac06deb361a88d2e388bfb8bb0225969e3ce25e738b82fd40c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:FQTJETFA5A3IJRUBERA3BZIIVY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mixed Precision Fermi-Operator Expansion on Tensor Cores From a Machine Learning Perspective","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","quant-ph"],"primary_cat":"physics.comp-ph","authors_text":"Anders M. N. Niklasson, Christian F. A. Negre, Emanuel H. Rubensson, Joshua Finkelstein, Justin Smith, Kipton Barros, Susan M. Mniszewski","submitted_at":"2021-01-16T06:55:20Z","abstract_excerpt":"We present a second-order recursive Fermi-operator expansion scheme using mixed precision floating point operations to perform electronic structure calculations using tensor core units. A performance of over 100 teraFLOPs is achieved for half-precision floating point operations on Nvidia's A100 tensor core units. The second-order recursive Fermi-operator scheme is formulated in terms of a generalized, differentiable deep neural network structure, which solves the quantum mechanical electronic structure problem. We demonstrate how this network can be accelerated by optimizing the weight and bia"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.06385","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/2101.06385/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":"2026-07-05T02:55:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+gK21ZzJidrEK+fQQazanwI6keChGASpIiOrRqCquhMUAB68v4oII8EXdCWuXjR+VuE4b7xGTwT5yyRJfLGICA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T00:08:49.884593Z"},"content_sha256":"39414f341f3c00ebdba40cb3bb9a93cb49d933989176c3a45f9f4c2e4b8f95b5","schema_version":"1.0","event_id":"sha256:39414f341f3c00ebdba40cb3bb9a93cb49d933989176c3a45f9f4c2e4b8f95b5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FQTJETFA5A3IJRUBERA3BZIIVY/bundle.json","state_url":"https://pith.science/pith/FQTJETFA5A3IJRUBERA3BZIIVY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FQTJETFA5A3IJRUBERA3BZIIVY/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":"2026-08-21T00:08:49Z","links":{"resolver":"https://pith.science/pith/FQTJETFA5A3IJRUBERA3BZIIVY","bundle":"https://pith.science/pith/FQTJETFA5A3IJRUBERA3BZIIVY/bundle.json","state":"https://pith.science/pith/FQTJETFA5A3IJRUBERA3BZIIVY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FQTJETFA5A3IJRUBERA3BZIIVY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:FQTJETFA5A3IJRUBERA3BZIIVY","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":"3235c1cbb2fe0908be967cc61aeb3eb039135d51be8821a18744e533ef0ea44a","cross_cats_sorted":["cond-mat.mtrl-sci","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2021-01-16T06:55:20Z","title_canon_sha256":"8ec9b26006aa82ad064096e24bd1a6796cfd6389039ca6d42ff845185d3aa119"},"schema_version":"1.0","source":{"id":"2101.06385","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.06385","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"arxiv_version","alias_value":"2101.06385v1","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.06385","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"pith_short_12","alias_value":"FQTJETFA5A3I","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"pith_short_16","alias_value":"FQTJETFA5A3IJRUB","created_at":"2026-07-05T02:55:53Z"},{"alias_kind":"pith_short_8","alias_value":"FQTJETFA","created_at":"2026-07-05T02:55:53Z"}],"graph_snapshots":[{"event_id":"sha256:39414f341f3c00ebdba40cb3bb9a93cb49d933989176c3a45f9f4c2e4b8f95b5","target":"graph","created_at":"2026-07-05T02:55:53Z","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/2101.06385/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a second-order recursive Fermi-operator expansion scheme using mixed precision floating point operations to perform electronic structure calculations using tensor core units. A performance of over 100 teraFLOPs is achieved for half-precision floating point operations on Nvidia's A100 tensor core units. The second-order recursive Fermi-operator scheme is formulated in terms of a generalized, differentiable deep neural network structure, which solves the quantum mechanical electronic structure problem. We demonstrate how this network can be accelerated by optimizing the weight and bia","authors_text":"Anders M. N. Niklasson, Christian F. A. Negre, Emanuel H. Rubensson, Joshua Finkelstein, Justin Smith, Kipton Barros, Susan M. Mniszewski","cross_cats":["cond-mat.mtrl-sci","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2021-01-16T06:55:20Z","title":"Mixed Precision Fermi-Operator Expansion on Tensor Cores From a Machine Learning Perspective"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.06385","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":"sha256:3e5abf0182f179ac06deb361a88d2e388bfb8bb0225969e3ce25e738b82fd40c","target":"record","created_at":"2026-07-05T02:55:53Z","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":"3235c1cbb2fe0908be967cc61aeb3eb039135d51be8821a18744e533ef0ea44a","cross_cats_sorted":["cond-mat.mtrl-sci","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2021-01-16T06:55:20Z","title_canon_sha256":"8ec9b26006aa82ad064096e24bd1a6796cfd6389039ca6d42ff845185d3aa119"},"schema_version":"1.0","source":{"id":"2101.06385","kind":"arxiv","version":1}},"canonical_sha256":"2c26924ca0e83684c6812441b0e508ae27336360d2ae5c8dc179e3ba984c452f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c26924ca0e83684c6812441b0e508ae27336360d2ae5c8dc179e3ba984c452f","first_computed_at":"2026-07-05T02:55:53.729959Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:55:53.729959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fV4vF2kuGjH/o0PF3omHpkjnRaoV1AO8RUQWzO9nK0c/CUHJO3ny7i/GvUIUCtCJUAAp5Q7523WKEE2A6RZrCw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:55:53.730297Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.06385","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e5abf0182f179ac06deb361a88d2e388bfb8bb0225969e3ce25e738b82fd40c","sha256:39414f341f3c00ebdba40cb3bb9a93cb49d933989176c3a45f9f4c2e4b8f95b5"],"state_sha256":"83d9e4182da64c7172d104b51ebd05e4507a725f49053e8c6e847e7ea296e309"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kD5RFbyLwEUXnPRZ4W1/u2KAnFfFOshyLU/b3MpS/3CDGJQt5/6uXSmOAMqZYNWI4WTVStv9teG3hWeSy9DqCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T00:08:49.889783Z","bundle_sha256":"6497d8b20e28d98e9c3532b98b62c25a5aeb506fae65003558cea57541cfed50"}}