{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:4BBFUBMJPHK57UMF2IW5NJR5MX","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":"a1041f43444a986e55061307d7048f1d97f4b4d9cba98db3efe9ac5ea75cb92e","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-06-11T17:23:01Z","title_canon_sha256":"8e0059e313759d7a84387477e228bab22bad8693ee6cbbcc9d2fb48b367307b2"},"schema_version":"1.0","source":{"id":"1406.2972","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.2972","created_at":"2026-05-18T02:45:21Z"},{"alias_kind":"arxiv_version","alias_value":"1406.2972v2","created_at":"2026-05-18T02:45:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.2972","created_at":"2026-05-18T02:45:21Z"},{"alias_kind":"pith_short_12","alias_value":"4BBFUBMJPHK5","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"4BBFUBMJPHK57UMF","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"4BBFUBMJ","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:5b46db5365485ee5f36b3eb2b5bba05fd01f56d381b5362a31f52317af7c32a3","target":"graph","created_at":"2026-05-18T02:45:21Z","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 study the effect of laser photon merging, or equivalently high harmonic generation, in the quantum vacuum subject to inhomogeneous electromagnetic fields. Such a process is facilitated by the effective nonlinear couplings arising from charged particle-antiparticle fluctuations in the quantum vacuum subject to strong electromagnetic fields. We derive explicit results for general kinematic and polarization configurations involving optical photons. Concentrating on merged photons in reflected channels which are preferable in experiments for reasons of noise suppression, we demonstrate that pho","authors_text":"Felix Karbstein, Holger Gies, Rashid Shaisultanov","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-06-11T17:23:01Z","title":"Laser photon merging in an electromagnetic field inhomogeneity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.2972","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":"sha256:963cb63c3fe2ea1b87f876028819a7bf5ae0361ee867711673d95d96dff1e31d","target":"record","created_at":"2026-05-18T02:45:21Z","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":"a1041f43444a986e55061307d7048f1d97f4b4d9cba98db3efe9ac5ea75cb92e","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-06-11T17:23:01Z","title_canon_sha256":"8e0059e313759d7a84387477e228bab22bad8693ee6cbbcc9d2fb48b367307b2"},"schema_version":"1.0","source":{"id":"1406.2972","kind":"arxiv","version":2}},"canonical_sha256":"e0425a058979d5dfd185d22dd6a63d65fcfd2f465e2ab1ee274dbb089357b888","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e0425a058979d5dfd185d22dd6a63d65fcfd2f465e2ab1ee274dbb089357b888","first_computed_at":"2026-05-18T02:45:21.311688Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:45:21.311688Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"39/LGkcQNYc5d6ljFrC4kNb1S9wpt4BTIV+MA+JpJRVHlVPB7Uy7SKp2n/cTNYYq7SRxPbWftKKVmQj5ocbDDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:45:21.312179Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.2972","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:963cb63c3fe2ea1b87f876028819a7bf5ae0361ee867711673d95d96dff1e31d","sha256:5b46db5365485ee5f36b3eb2b5bba05fd01f56d381b5362a31f52317af7c32a3"],"state_sha256":"f1f57b8723b7c62f56f77302711b6d7416ab736a154ae095afac909144a09671"}