{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:74PC6OMBQ6UX244ZR2VMBKS3XG","short_pith_number":"pith:74PC6OMB","canonical_record":{"source":{"id":"1402.0378","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-02-03T13:24:36Z","cross_cats_sorted":[],"title_canon_sha256":"4144109ae643b14457c2a6787f7f7737148fc4cd9e91aa459eaeb5060afb363b","abstract_canon_sha256":"7794bbdaf2c6fec2356d31910bd15e9b74bff71d6009e27c0ade7a6c367f18ce"},"schema_version":"1.0"},"canonical_sha256":"ff1e2f398187a97d73998eaac0aa5bb98214d400df73ded52fb9f5988a774917","source":{"kind":"arxiv","id":"1402.0378","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.0378","created_at":"2026-05-18T02:40:47Z"},{"alias_kind":"arxiv_version","alias_value":"1402.0378v1","created_at":"2026-05-18T02:40:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.0378","created_at":"2026-05-18T02:40:47Z"},{"alias_kind":"pith_short_12","alias_value":"74PC6OMBQ6UX","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"74PC6OMBQ6UX244Z","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"74PC6OMB","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:74PC6OMBQ6UX244ZR2VMBKS3XG","target":"record","payload":{"canonical_record":{"source":{"id":"1402.0378","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-02-03T13:24:36Z","cross_cats_sorted":[],"title_canon_sha256":"4144109ae643b14457c2a6787f7f7737148fc4cd9e91aa459eaeb5060afb363b","abstract_canon_sha256":"7794bbdaf2c6fec2356d31910bd15e9b74bff71d6009e27c0ade7a6c367f18ce"},"schema_version":"1.0"},"canonical_sha256":"ff1e2f398187a97d73998eaac0aa5bb98214d400df73ded52fb9f5988a774917","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:40:47.289434Z","signature_b64":"fUNBn3PCW79KMrPK25922DuvIZZ+yKQd37LlraDK+Ndd2jOxpWOlQ52m0EVq7F38BQcc0TSMTKacOYvOR2JGAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff1e2f398187a97d73998eaac0aa5bb98214d400df73ded52fb9f5988a774917","last_reissued_at":"2026-05-18T02:40:47.288835Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:40:47.288835Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.0378","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":"2026-05-18T02:40:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CxMrStJYzKAgythDkShFTleK1S3IMwwdc+RjB0XpcT2cwiuxMvMKIic5Xw1w3OiC1Pz4juW5gguOmyksZKyyAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T11:51:11.979740Z"},"content_sha256":"496e6204b3df0d564a311be04110f5921abfd2e9139a2c008cd74d77eb7efb28","schema_version":"1.0","event_id":"sha256:496e6204b3df0d564a311be04110f5921abfd2e9139a2c008cd74d77eb7efb28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:74PC6OMBQ6UX244ZR2VMBKS3XG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimisation of Bell inequalities with invariant Tsirelson bound","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Dagmar Bru{\\ss}, Hermann Kampermann, Michael Epping","submitted_at":"2014-02-03T13:24:36Z","abstract_excerpt":"We consider a subclass of bipartite CHSH-type Bell inequalities. We investigate operations, which leave their Tsirelson bound invariant, but change their classical bound. The optimal observables are unaffected except for a relative rotation of the two laboratories. We illustrate the utility of these operations by giving explicit examples: We prove that for a fixed quantum state and fixed measurement setup except for a relative rotation of the two laboratories, there is a Bell inequality that is maximally violated for this rotation, and we optimise some Bell inequalities with respect to the max"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0378","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":"2026-05-18T02:40:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S9DX1NzGIVoRoOu89P8GeDRWuntViDUmz2eK7s+x7Xsf51a6N+p2sSt8u4go44NeEj6t1G8DhC+QvHaRc6bGBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T11:51:11.980080Z"},"content_sha256":"76ffb7d5b47ffe1da1b548c4b04b1167d70d45d5f5af0788e9d38d2dd998e827","schema_version":"1.0","event_id":"sha256:76ffb7d5b47ffe1da1b548c4b04b1167d70d45d5f5af0788e9d38d2dd998e827"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/74PC6OMBQ6UX244ZR2VMBKS3XG/bundle.json","state_url":"https://pith.science/pith/74PC6OMBQ6UX244ZR2VMBKS3XG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/74PC6OMBQ6UX244ZR2VMBKS3XG/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":"2026-07-03T11:51:11Z","links":{"resolver":"https://pith.science/pith/74PC6OMBQ6UX244ZR2VMBKS3XG","bundle":"https://pith.science/pith/74PC6OMBQ6UX244ZR2VMBKS3XG/bundle.json","state":"https://pith.science/pith/74PC6OMBQ6UX244ZR2VMBKS3XG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/74PC6OMBQ6UX244ZR2VMBKS3XG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:74PC6OMBQ6UX244ZR2VMBKS3XG","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":"7794bbdaf2c6fec2356d31910bd15e9b74bff71d6009e27c0ade7a6c367f18ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-02-03T13:24:36Z","title_canon_sha256":"4144109ae643b14457c2a6787f7f7737148fc4cd9e91aa459eaeb5060afb363b"},"schema_version":"1.0","source":{"id":"1402.0378","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.0378","created_at":"2026-05-18T02:40:47Z"},{"alias_kind":"arxiv_version","alias_value":"1402.0378v1","created_at":"2026-05-18T02:40:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.0378","created_at":"2026-05-18T02:40:47Z"},{"alias_kind":"pith_short_12","alias_value":"74PC6OMBQ6UX","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"74PC6OMBQ6UX244Z","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"74PC6OMB","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:76ffb7d5b47ffe1da1b548c4b04b1167d70d45d5f5af0788e9d38d2dd998e827","target":"graph","created_at":"2026-05-18T02:40:47Z","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 consider a subclass of bipartite CHSH-type Bell inequalities. We investigate operations, which leave their Tsirelson bound invariant, but change their classical bound. The optimal observables are unaffected except for a relative rotation of the two laboratories. We illustrate the utility of these operations by giving explicit examples: We prove that for a fixed quantum state and fixed measurement setup except for a relative rotation of the two laboratories, there is a Bell inequality that is maximally violated for this rotation, and we optimise some Bell inequalities with respect to the max","authors_text":"Dagmar Bru{\\ss}, Hermann Kampermann, Michael Epping","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-02-03T13:24:36Z","title":"Optimisation of Bell inequalities with invariant Tsirelson bound"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0378","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":"sha256:496e6204b3df0d564a311be04110f5921abfd2e9139a2c008cd74d77eb7efb28","target":"record","created_at":"2026-05-18T02:40:47Z","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":"7794bbdaf2c6fec2356d31910bd15e9b74bff71d6009e27c0ade7a6c367f18ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-02-03T13:24:36Z","title_canon_sha256":"4144109ae643b14457c2a6787f7f7737148fc4cd9e91aa459eaeb5060afb363b"},"schema_version":"1.0","source":{"id":"1402.0378","kind":"arxiv","version":1}},"canonical_sha256":"ff1e2f398187a97d73998eaac0aa5bb98214d400df73ded52fb9f5988a774917","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff1e2f398187a97d73998eaac0aa5bb98214d400df73ded52fb9f5988a774917","first_computed_at":"2026-05-18T02:40:47.288835Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:40:47.288835Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fUNBn3PCW79KMrPK25922DuvIZZ+yKQd37LlraDK+Ndd2jOxpWOlQ52m0EVq7F38BQcc0TSMTKacOYvOR2JGAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:40:47.289434Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.0378","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:496e6204b3df0d564a311be04110f5921abfd2e9139a2c008cd74d77eb7efb28","sha256:76ffb7d5b47ffe1da1b548c4b04b1167d70d45d5f5af0788e9d38d2dd998e827"],"state_sha256":"05e6a03478c70efcd7a50a3d3adf8f86227df2c3cadecfc5588c8266d1225571"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j18hUEIAEILAhoy5SQ41KGehU5iBU6WgBo8Bz0NxzRBwPjWLSAN9SV0KUmoTqHC08eym+xFWRlkiJM11ECR4Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-03T11:51:11.982025Z","bundle_sha256":"1ca085df4c82bed8346ed632968c8c36436d3ed5c0b649c38992734fa1e0544e"}}