{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:UGCNY5D3WOXGUVF2GDQMT6O472","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":"3a5987e645f8344813d57b2206593ffec26552f2d5d83a691436328477b3562d","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2000-12-15T11:55:52Z","title_canon_sha256":"9f699406e210d86cec882cb445f36ec53b543860891eb38a5aecbde3aa93a6ce"},"schema_version":"1.0","source":{"id":"quant-ph/0012073","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0012073","created_at":"2026-07-04T16:23:05Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0012073v2","created_at":"2026-07-04T16:23:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0012073","created_at":"2026-07-04T16:23:05Z"},{"alias_kind":"pith_short_12","alias_value":"UGCNY5D3WOXG","created_at":"2026-07-04T16:23:05Z"},{"alias_kind":"pith_short_16","alias_value":"UGCNY5D3WOXGUVF2","created_at":"2026-07-04T16:23:05Z"},{"alias_kind":"pith_short_8","alias_value":"UGCNY5D3","created_at":"2026-07-04T16:23:05Z"}],"graph_snapshots":[{"event_id":"sha256:d37b5527499d8eff0117677f06cd65bcfe904f4d8b2be775125281e6816b594b","target":"graph","created_at":"2026-07-04T16:23:05Z","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/quant-ph/0012073/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose an optical double-cavity resonator whose response to a signal is similar to that of an Electromagnetically Induced Transparency (EIT) medium. A combination of such a device with a four-level EIT medium can serve for achieving large cross-Kerr modulation of a probe field by a signal field. This would offer the possibility of building a quantum logic gate based on photonic qubits. We discuss the technical requirements that are necessary for realizing a probe-photon phase shift of Pi caused by a single-photon signal. The main difficulty is the requirement of an ultra-low reflectivity b","authors_text":"D.-G. Welsch, T. Opatrny","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2000-12-15T11:55:52Z","title":"Coupled cavities for enhancing the cross-phase modulation in electromagnetically induced transparency"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0012073","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":"sha256:4fb17a5ea252d895fecfa4d735871354db9f0eac5f4d24a3c027ab06b5b496ca","target":"record","created_at":"2026-07-04T16:23:05Z","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":"3a5987e645f8344813d57b2206593ffec26552f2d5d83a691436328477b3562d","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2000-12-15T11:55:52Z","title_canon_sha256":"9f699406e210d86cec882cb445f36ec53b543860891eb38a5aecbde3aa93a6ce"},"schema_version":"1.0","source":{"id":"quant-ph/0012073","kind":"arxiv","version":2}},"canonical_sha256":"a184dc747bb3ae6a54ba30e0c9f9dcfe863f68e4eec7ba04be7f3d5c8697cd9c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a184dc747bb3ae6a54ba30e0c9f9dcfe863f68e4eec7ba04be7f3d5c8697cd9c","first_computed_at":"2026-07-04T16:23:05.824847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:23:05.824847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fv0npKNc5Guax3lItmD6/OBpgXbIPlGNtoEu+61e7GxX5ljiLbgj56sFAqGudhx99WQzrKAIKh5kGpfiCUa2AA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:23:05.825232Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0012073","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4fb17a5ea252d895fecfa4d735871354db9f0eac5f4d24a3c027ab06b5b496ca","sha256:d37b5527499d8eff0117677f06cd65bcfe904f4d8b2be775125281e6816b594b"],"state_sha256":"63d4a8b713be3b1f97c5aa6e351a6563687770fcfd900621c5b24c1fbd75c695"}