{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:EUGEWEQEM5MGDA3IDTUH3SPY54","short_pith_number":"pith:EUGEWEQE","canonical_record":{"source":{"id":"2501.03311","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-06T19:00:00Z","cross_cats_sorted":["hep-ex","quant-ph"],"title_canon_sha256":"e8cf63da00511f23b2c91e5746c3f2dff56e3d90254872989adf50943fce3f72","abstract_canon_sha256":"2ea6d0af37f8a6ab060143a14dbfc01443fbcd3be0316ccf371be9af1c46322f"},"schema_version":"1.0"},"canonical_sha256":"250c4b120467586183681ce87dc9f8ef32f9e8af2f8961ba74920cf5a72c88e9","source":{"kind":"arxiv","id":"2501.03311","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.03311","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"arxiv_version","alias_value":"2501.03311v2","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.03311","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"pith_short_12","alias_value":"EUGEWEQEM5MG","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"pith_short_16","alias_value":"EUGEWEQEM5MGDA3I","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"pith_short_8","alias_value":"EUGEWEQE","created_at":"2026-07-05T11:33:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:EUGEWEQEM5MGDA3IDTUH3SPY54","target":"record","payload":{"canonical_record":{"source":{"id":"2501.03311","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-06T19:00:00Z","cross_cats_sorted":["hep-ex","quant-ph"],"title_canon_sha256":"e8cf63da00511f23b2c91e5746c3f2dff56e3d90254872989adf50943fce3f72","abstract_canon_sha256":"2ea6d0af37f8a6ab060143a14dbfc01443fbcd3be0316ccf371be9af1c46322f"},"schema_version":"1.0"},"canonical_sha256":"250c4b120467586183681ce87dc9f8ef32f9e8af2f8961ba74920cf5a72c88e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:33:19.142425Z","signature_b64":"PGWtnmNKfvvdyeJElkoI1KqMsQ3hTfgL10orxKIS6gy1PrVwz7qPKVMC8HXgLK46MCZ7JJejL/nE65pqPvWKBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"250c4b120467586183681ce87dc9f8ef32f9e8af2f8961ba74920cf5a72c88e9","last_reissued_at":"2026-07-05T11:33:19.141867Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:33:19.141867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.03311","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":"2026-07-05T11:33:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CDwCRtORi08IViaIKjRjj2Blnw4eYK8qa2T/Kg9Kj8gIiM1SRcIMsaKCMfLr0bHum0w4/9j4N+zkd+/w/PL8BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T00:05:30.774563Z"},"content_sha256":"58b66c67cefc03f723ffcc79625fa2071631c4593b41bb6ba593cbf163fd616c","schema_version":"1.0","event_id":"sha256:58b66c67cefc03f723ffcc79625fa2071631c4593b41bb6ba593cbf163fd616c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:EUGEWEQEM5MGDA3IDTUH3SPY54","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The trace distance between density matrices, a nifty tool in new-physics searches","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex","quant-ph"],"primary_cat":"hep-ph","authors_text":"Luca Marzola, Marco Fabbrichesi, Matthew Low","submitted_at":"2025-01-06T19:00:00Z","abstract_excerpt":"Quantum information methods have been brought to bear on high-energy physics, including the study of entanglement and Bell nonlocality in collider experiments. Quantum information observables have also been employed to constrain possible new physics effects. We improve on this point by introducing quantum information tools routinely used to compare quantum states: the trace distance and the fidelity. We find that the former outperforms other quantum information observables considered in the literature and, together with the cross section, yields the strongest bounds on possible departures from"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.03311","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.03311/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":"2026-07-05T11:33:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zsHp2qehNSN1CSZEzPO20PVVHLJYPEUWWnI8hYxvjeWlTRWvTprb6usPY2dC5pIpk8QE7Cw0YQmk12L3Yte8Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T00:05:30.775160Z"},"content_sha256":"cab35fd31807ac612114ff85df56f4b30c4a94316d2b87317538d6eb6e76f60b","schema_version":"1.0","event_id":"sha256:cab35fd31807ac612114ff85df56f4b30c4a94316d2b87317538d6eb6e76f60b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EUGEWEQEM5MGDA3IDTUH3SPY54/bundle.json","state_url":"https://pith.science/pith/EUGEWEQEM5MGDA3IDTUH3SPY54/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EUGEWEQEM5MGDA3IDTUH3SPY54/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":"2026-08-11T00:05:30Z","links":{"resolver":"https://pith.science/pith/EUGEWEQEM5MGDA3IDTUH3SPY54","bundle":"https://pith.science/pith/EUGEWEQEM5MGDA3IDTUH3SPY54/bundle.json","state":"https://pith.science/pith/EUGEWEQEM5MGDA3IDTUH3SPY54/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EUGEWEQEM5MGDA3IDTUH3SPY54/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:EUGEWEQEM5MGDA3IDTUH3SPY54","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":"2ea6d0af37f8a6ab060143a14dbfc01443fbcd3be0316ccf371be9af1c46322f","cross_cats_sorted":["hep-ex","quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-06T19:00:00Z","title_canon_sha256":"e8cf63da00511f23b2c91e5746c3f2dff56e3d90254872989adf50943fce3f72"},"schema_version":"1.0","source":{"id":"2501.03311","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.03311","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"arxiv_version","alias_value":"2501.03311v2","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.03311","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"pith_short_12","alias_value":"EUGEWEQEM5MG","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"pith_short_16","alias_value":"EUGEWEQEM5MGDA3I","created_at":"2026-07-05T11:33:19Z"},{"alias_kind":"pith_short_8","alias_value":"EUGEWEQE","created_at":"2026-07-05T11:33:19Z"}],"graph_snapshots":[{"event_id":"sha256:cab35fd31807ac612114ff85df56f4b30c4a94316d2b87317538d6eb6e76f60b","target":"graph","created_at":"2026-07-05T11:33:19Z","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/2501.03311/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum information methods have been brought to bear on high-energy physics, including the study of entanglement and Bell nonlocality in collider experiments. Quantum information observables have also been employed to constrain possible new physics effects. We improve on this point by introducing quantum information tools routinely used to compare quantum states: the trace distance and the fidelity. We find that the former outperforms other quantum information observables considered in the literature and, together with the cross section, yields the strongest bounds on possible departures from","authors_text":"Luca Marzola, Marco Fabbrichesi, Matthew Low","cross_cats":["hep-ex","quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-06T19:00:00Z","title":"The trace distance between density matrices, a nifty tool in new-physics searches"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.03311","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":"sha256:58b66c67cefc03f723ffcc79625fa2071631c4593b41bb6ba593cbf163fd616c","target":"record","created_at":"2026-07-05T11:33:19Z","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":"2ea6d0af37f8a6ab060143a14dbfc01443fbcd3be0316ccf371be9af1c46322f","cross_cats_sorted":["hep-ex","quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2025-01-06T19:00:00Z","title_canon_sha256":"e8cf63da00511f23b2c91e5746c3f2dff56e3d90254872989adf50943fce3f72"},"schema_version":"1.0","source":{"id":"2501.03311","kind":"arxiv","version":2}},"canonical_sha256":"250c4b120467586183681ce87dc9f8ef32f9e8af2f8961ba74920cf5a72c88e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"250c4b120467586183681ce87dc9f8ef32f9e8af2f8961ba74920cf5a72c88e9","first_computed_at":"2026-07-05T11:33:19.141867Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:33:19.141867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PGWtnmNKfvvdyeJElkoI1KqMsQ3hTfgL10orxKIS6gy1PrVwz7qPKVMC8HXgLK46MCZ7JJejL/nE65pqPvWKBA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:33:19.142425Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.03311","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58b66c67cefc03f723ffcc79625fa2071631c4593b41bb6ba593cbf163fd616c","sha256:cab35fd31807ac612114ff85df56f4b30c4a94316d2b87317538d6eb6e76f60b"],"state_sha256":"f82b6d6ce54f2f6b956cfddd21c77b9f5fefafc7ba8757ce8c0d5bb84e4c6edb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d2i5W54+yJsfDN1aUY99dvYPGUIkMkq257nIynf9eJ7GMOEa5yL+756dKp7zR51DcH788KP8QNquczRcsg3lAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T00:05:30.780203Z","bundle_sha256":"84de20740cb2f73785aa3533705149d66ab5d3a47086be176247a5e8ca5374ba"}}