{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:PQ7XZ6HGILNCMGRPDG2O77B3RO","short_pith_number":"pith:PQ7XZ6HG","canonical_record":{"source":{"id":"2506.20796","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-06-25T19:40:23Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"44324cc30ea65f3d867f9f247947248045a0fbd164bde1213866b66ee1993769","abstract_canon_sha256":"3ccf50942d670b471060a3d827db59d2933f3064b69c07e0aead0b0b64bc70b7"},"schema_version":"1.0"},"canonical_sha256":"7c3f7cf8e642da261a2f19b4effc3b8b90aa59b7714f3ed5f9585962edad7829","source":{"kind":"arxiv","id":"2506.20796","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.20796","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"arxiv_version","alias_value":"2506.20796v3","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.20796","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"pith_short_12","alias_value":"PQ7XZ6HGILNC","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"pith_short_16","alias_value":"PQ7XZ6HGILNCMGRP","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"pith_short_8","alias_value":"PQ7XZ6HG","created_at":"2026-07-05T11:36:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:PQ7XZ6HGILNCMGRPDG2O77B3RO","target":"record","payload":{"canonical_record":{"source":{"id":"2506.20796","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-06-25T19:40:23Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"44324cc30ea65f3d867f9f247947248045a0fbd164bde1213866b66ee1993769","abstract_canon_sha256":"3ccf50942d670b471060a3d827db59d2933f3064b69c07e0aead0b0b64bc70b7"},"schema_version":"1.0"},"canonical_sha256":"7c3f7cf8e642da261a2f19b4effc3b8b90aa59b7714f3ed5f9585962edad7829","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:36:33.559689Z","signature_b64":"uCeZykYLiTO/vY6MYOruA+l/o70Ys3vyrlSvWRPaW+7dYcdFUKQ9bNQzVqswICl0HLr6TLNz7A5mcWd0MhlFDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7c3f7cf8e642da261a2f19b4effc3b8b90aa59b7714f3ed5f9585962edad7829","last_reissued_at":"2026-07-05T11:36:33.559186Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:36:33.559186Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.20796","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:36:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MgcPzdNWJkE2ItEbLZ6i2OnELRNXGDwPwKDaGUd3wMI4gfMTR2FqirmjSZSvGS0p3dQvZoPy8AI3LxgS4+lMBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T07:43:01.682573Z"},"content_sha256":"6142cf359ecc4ceafc9e11e879f465e61669466a0ff73874c647c95ca0950b63","schema_version":"1.0","event_id":"sha256:6142cf359ecc4ceafc9e11e879f465e61669466a0ff73874c647c95ca0950b63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:PQ7XZ6HGILNCMGRPDG2O77B3RO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observing High-dimensional Bell Inequality Violations using Multi-Outcome Spectral Measurements","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Abhinandan Bhattacharjee, Armin Tavakoli, Benjamin Brecht, Christine Silberhorn, Jonathan Leach, Kiki Dekkers, Laura Serino, Nicola DAlessandro","submitted_at":"2025-06-25T19:40:23Z","abstract_excerpt":"Violation of Bell inequalities is an essential requirement for many quantum information and communication protocols. In high-dimensional systems, Bell inequality tests face the challenge of implementing genuinely multi-outcome measurements, since the emulation of these with separate dichotomic projections opens a binarisation loophole that local hidden variable theories can exploit. Here we show that the joint spectral intensity of a two-photon entangled state contains access to the necessary multi-outcome measurements to overcome this obstacle and certify and violate a Bell inequality for hig"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.20796","kind":"arxiv","version":3},"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/2506.20796/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":"2026-07-05T11:36:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SNnI3jwQ72WviOBshcJ+L2AVwlGyhOlP0zg4F0fjJYLR/3sP39OCahG/LSC9pSAVdwI1E6xdt76lzF7PgLTmCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T07:43:01.682948Z"},"content_sha256":"b1bb35afb89d9e4c23df95e3dee724929c8efd66b6fae052660a1dba685cbae8","schema_version":"1.0","event_id":"sha256:b1bb35afb89d9e4c23df95e3dee724929c8efd66b6fae052660a1dba685cbae8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PQ7XZ6HGILNCMGRPDG2O77B3RO/bundle.json","state_url":"https://pith.science/pith/PQ7XZ6HGILNCMGRPDG2O77B3RO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PQ7XZ6HGILNCMGRPDG2O77B3RO/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":"2026-07-25T07:43:01Z","links":{"resolver":"https://pith.science/pith/PQ7XZ6HGILNCMGRPDG2O77B3RO","bundle":"https://pith.science/pith/PQ7XZ6HGILNCMGRPDG2O77B3RO/bundle.json","state":"https://pith.science/pith/PQ7XZ6HGILNCMGRPDG2O77B3RO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PQ7XZ6HGILNCMGRPDG2O77B3RO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:PQ7XZ6HGILNCMGRPDG2O77B3RO","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":"3ccf50942d670b471060a3d827db59d2933f3064b69c07e0aead0b0b64bc70b7","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-06-25T19:40:23Z","title_canon_sha256":"44324cc30ea65f3d867f9f247947248045a0fbd164bde1213866b66ee1993769"},"schema_version":"1.0","source":{"id":"2506.20796","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.20796","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"arxiv_version","alias_value":"2506.20796v3","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.20796","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"pith_short_12","alias_value":"PQ7XZ6HGILNC","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"pith_short_16","alias_value":"PQ7XZ6HGILNCMGRP","created_at":"2026-07-05T11:36:33Z"},{"alias_kind":"pith_short_8","alias_value":"PQ7XZ6HG","created_at":"2026-07-05T11:36:33Z"}],"graph_snapshots":[{"event_id":"sha256:b1bb35afb89d9e4c23df95e3dee724929c8efd66b6fae052660a1dba685cbae8","target":"graph","created_at":"2026-07-05T11:36:33Z","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/2506.20796/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Violation of Bell inequalities is an essential requirement for many quantum information and communication protocols. In high-dimensional systems, Bell inequality tests face the challenge of implementing genuinely multi-outcome measurements, since the emulation of these with separate dichotomic projections opens a binarisation loophole that local hidden variable theories can exploit. Here we show that the joint spectral intensity of a two-photon entangled state contains access to the necessary multi-outcome measurements to overcome this obstacle and certify and violate a Bell inequality for hig","authors_text":"Abhinandan Bhattacharjee, Armin Tavakoli, Benjamin Brecht, Christine Silberhorn, Jonathan Leach, Kiki Dekkers, Laura Serino, Nicola DAlessandro","cross_cats":["physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-06-25T19:40:23Z","title":"Observing High-dimensional Bell Inequality Violations using Multi-Outcome Spectral Measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.20796","kind":"arxiv","version":3},"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":"sha256:6142cf359ecc4ceafc9e11e879f465e61669466a0ff73874c647c95ca0950b63","target":"record","created_at":"2026-07-05T11:36:33Z","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":"3ccf50942d670b471060a3d827db59d2933f3064b69c07e0aead0b0b64bc70b7","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-06-25T19:40:23Z","title_canon_sha256":"44324cc30ea65f3d867f9f247947248045a0fbd164bde1213866b66ee1993769"},"schema_version":"1.0","source":{"id":"2506.20796","kind":"arxiv","version":3}},"canonical_sha256":"7c3f7cf8e642da261a2f19b4effc3b8b90aa59b7714f3ed5f9585962edad7829","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7c3f7cf8e642da261a2f19b4effc3b8b90aa59b7714f3ed5f9585962edad7829","first_computed_at":"2026-07-05T11:36:33.559186Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:36:33.559186Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uCeZykYLiTO/vY6MYOruA+l/o70Ys3vyrlSvWRPaW+7dYcdFUKQ9bNQzVqswICl0HLr6TLNz7A5mcWd0MhlFDw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:36:33.559689Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.20796","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6142cf359ecc4ceafc9e11e879f465e61669466a0ff73874c647c95ca0950b63","sha256:b1bb35afb89d9e4c23df95e3dee724929c8efd66b6fae052660a1dba685cbae8"],"state_sha256":"160f68f6a95560b3f4961a8bb1f6160b8645e6cadb414be039a7090f98f3de4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EQTRG4s/5CHhd/faClr45f5/NXjP9ttLCU37xoP320g/rBET6yuKjRJaVEei7lqh4O+5NUb8m8QU8HUwodq+Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-25T07:43:01.685365Z","bundle_sha256":"e2ac1d05f010b5a672d501dfbd51ae9070e0da5739d76eaf6c8589e004dc098a"}}