{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:E2NRQBSHOPVZXQUYAZX3JF5CXF","short_pith_number":"pith:E2NRQBSH","canonical_record":{"source":{"id":"1210.6751","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-10-25T07:12:54Z","cross_cats_sorted":["hep-ex","hep-ph"],"title_canon_sha256":"324c0f961fea794fce5382f480093b46272203e686cab6554b419afbb4c5963d","abstract_canon_sha256":"b62eb921940b0bc471748319117f7d430e3dc835d98b4fdef5a8b86008ba9548"},"schema_version":"1.0"},"canonical_sha256":"269b18064773eb9bc298066fb497a2b97ec7758f5c08b2c4adcf2196151cd331","source":{"kind":"arxiv","id":"1210.6751","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.6751","created_at":"2026-05-18T03:42:23Z"},{"alias_kind":"arxiv_version","alias_value":"1210.6751v1","created_at":"2026-05-18T03:42:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.6751","created_at":"2026-05-18T03:42:23Z"},{"alias_kind":"pith_short_12","alias_value":"E2NRQBSHOPVZ","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"E2NRQBSHOPVZXQUY","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"E2NRQBSH","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:E2NRQBSHOPVZXQUYAZX3JF5CXF","target":"record","payload":{"canonical_record":{"source":{"id":"1210.6751","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-10-25T07:12:54Z","cross_cats_sorted":["hep-ex","hep-ph"],"title_canon_sha256":"324c0f961fea794fce5382f480093b46272203e686cab6554b419afbb4c5963d","abstract_canon_sha256":"b62eb921940b0bc471748319117f7d430e3dc835d98b4fdef5a8b86008ba9548"},"schema_version":"1.0"},"canonical_sha256":"269b18064773eb9bc298066fb497a2b97ec7758f5c08b2c4adcf2196151cd331","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:42:23.264991Z","signature_b64":"ekl3+AeBe74/F3TEulf4jqorDiHGrOaJSh4tGrajs3NIZ5SLgPJGuJX6rzHdbenx22N/fQcCVrQH9QOvLZ5RBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"269b18064773eb9bc298066fb497a2b97ec7758f5c08b2c4adcf2196151cd331","last_reissued_at":"2026-05-18T03:42:23.264431Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:42:23.264431Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.6751","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":"2026-05-18T03:42:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"06wjgtnfxSeb7xd6KBcnD7TdBZUUo2qwQpJwAl0k1THD7f6eZhk7pEkwc+eAmrCdwlUSI76JiGu/Taw7MKpiCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T19:05:42.805172Z"},"content_sha256":"9cdce16c46dfdc8fd8bf4a3e10dddd9edd641ff650f5ae2d0788384f43cae1ae","schema_version":"1.0","event_id":"sha256:9cdce16c46dfdc8fd8bf4a3e10dddd9edd641ff650f5ae2d0788384f43cae1ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:E2NRQBSHOPVZXQUYAZX3JF5CXF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exploring quantum vacuum with low-energy photons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-ph"],"primary_cat":"physics.ins-det","authors_text":"C. Curceanu, C. Milardi, D. Babusci, E. Milotti, F. Della Valle, G. Messineo, G. Ruoso, G. Zavattini, M. Iliescu, R. Pengo, U. Gastaldi","submitted_at":"2012-10-25T07:12:54Z","abstract_excerpt":"Although quantum mechanics (QM) and quantum field theory (QFT) are highly successful, the seemingly simplest state -- vacuum -- remains mysterious. While the LHC experiments are expected to clarify basic questions on the structure of QFT vacuum, much can still be done at lower energies as well. For instance, experiments like PVLAS try to reach extremely high sensitivities, in their attempt to observe the effects of the interaction of visible or near-visible photons with intense magnetic fields -- a process which becomes possible in quantum electrodynamics (QED) thanks to the vacuum fluctuation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.6751","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":"2026-05-18T03:42:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NJ+JcDwou9iL28VCrbNKmTrn7AZhmIYkH31vhjvXqz3BH2Wq29mU5z3J/E510JXEpLTXzFFjEltkXo/bCnInBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T19:05:42.805536Z"},"content_sha256":"9d747cf65a1ca93d5cbd9c5c1a2cc68492ea41b16411649293a9a579645875b9","schema_version":"1.0","event_id":"sha256:9d747cf65a1ca93d5cbd9c5c1a2cc68492ea41b16411649293a9a579645875b9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E2NRQBSHOPVZXQUYAZX3JF5CXF/bundle.json","state_url":"https://pith.science/pith/E2NRQBSHOPVZXQUYAZX3JF5CXF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E2NRQBSHOPVZXQUYAZX3JF5CXF/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":"2026-06-01T19:05:42Z","links":{"resolver":"https://pith.science/pith/E2NRQBSHOPVZXQUYAZX3JF5CXF","bundle":"https://pith.science/pith/E2NRQBSHOPVZXQUYAZX3JF5CXF/bundle.json","state":"https://pith.science/pith/E2NRQBSHOPVZXQUYAZX3JF5CXF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E2NRQBSHOPVZXQUYAZX3JF5CXF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:E2NRQBSHOPVZXQUYAZX3JF5CXF","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":"b62eb921940b0bc471748319117f7d430e3dc835d98b4fdef5a8b86008ba9548","cross_cats_sorted":["hep-ex","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-10-25T07:12:54Z","title_canon_sha256":"324c0f961fea794fce5382f480093b46272203e686cab6554b419afbb4c5963d"},"schema_version":"1.0","source":{"id":"1210.6751","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.6751","created_at":"2026-05-18T03:42:23Z"},{"alias_kind":"arxiv_version","alias_value":"1210.6751v1","created_at":"2026-05-18T03:42:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.6751","created_at":"2026-05-18T03:42:23Z"},{"alias_kind":"pith_short_12","alias_value":"E2NRQBSHOPVZ","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"E2NRQBSHOPVZXQUY","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"E2NRQBSH","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:9d747cf65a1ca93d5cbd9c5c1a2cc68492ea41b16411649293a9a579645875b9","target":"graph","created_at":"2026-05-18T03:42:23Z","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":"Although quantum mechanics (QM) and quantum field theory (QFT) are highly successful, the seemingly simplest state -- vacuum -- remains mysterious. While the LHC experiments are expected to clarify basic questions on the structure of QFT vacuum, much can still be done at lower energies as well. For instance, experiments like PVLAS try to reach extremely high sensitivities, in their attempt to observe the effects of the interaction of visible or near-visible photons with intense magnetic fields -- a process which becomes possible in quantum electrodynamics (QED) thanks to the vacuum fluctuation","authors_text":"C. Curceanu, C. Milardi, D. Babusci, E. Milotti, F. Della Valle, G. Messineo, G. Ruoso, G. Zavattini, M. Iliescu, R. Pengo, U. Gastaldi","cross_cats":["hep-ex","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-10-25T07:12:54Z","title":"Exploring quantum vacuum with low-energy photons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.6751","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":"sha256:9cdce16c46dfdc8fd8bf4a3e10dddd9edd641ff650f5ae2d0788384f43cae1ae","target":"record","created_at":"2026-05-18T03:42:23Z","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":"b62eb921940b0bc471748319117f7d430e3dc835d98b4fdef5a8b86008ba9548","cross_cats_sorted":["hep-ex","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-10-25T07:12:54Z","title_canon_sha256":"324c0f961fea794fce5382f480093b46272203e686cab6554b419afbb4c5963d"},"schema_version":"1.0","source":{"id":"1210.6751","kind":"arxiv","version":1}},"canonical_sha256":"269b18064773eb9bc298066fb497a2b97ec7758f5c08b2c4adcf2196151cd331","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"269b18064773eb9bc298066fb497a2b97ec7758f5c08b2c4adcf2196151cd331","first_computed_at":"2026-05-18T03:42:23.264431Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:42:23.264431Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ekl3+AeBe74/F3TEulf4jqorDiHGrOaJSh4tGrajs3NIZ5SLgPJGuJX6rzHdbenx22N/fQcCVrQH9QOvLZ5RBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:42:23.264991Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.6751","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9cdce16c46dfdc8fd8bf4a3e10dddd9edd641ff650f5ae2d0788384f43cae1ae","sha256:9d747cf65a1ca93d5cbd9c5c1a2cc68492ea41b16411649293a9a579645875b9"],"state_sha256":"f71dc58ae0a66c468f66a71174c688f5f784b90107ed00704071caed1749075a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VHS7gfN1fuYbjOljKrRlsbGtCiI18iSKp25TN/JHvMsu1Jj9C5bQGz16IuT7djnqwgt+GwnhdXA5pE4nsh6aBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T19:05:42.807440Z","bundle_sha256":"bccdd4424cfd4781a8fa810a39f5118cc895136a9a23353cb1b3bce0ccda5a1a"}}