{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:DMCIXLJVK7VFCNOOHC6MDDSINY","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":"57f263b912482538783fb006aabd38b685982b0484fba90e08be7042575a7563","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-12-09T14:32:58Z","title_canon_sha256":"248c9ba83cb7aa831d63de4a66629d9ffa37eab6c72ad48db0bc7ff37b208e0d"},"schema_version":"1.0","source":{"id":"1612.03036","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.03036","created_at":"2026-05-18T00:43:18Z"},{"alias_kind":"arxiv_version","alias_value":"1612.03036v3","created_at":"2026-05-18T00:43:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.03036","created_at":"2026-05-18T00:43:18Z"},{"alias_kind":"pith_short_12","alias_value":"DMCIXLJVK7VF","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DMCIXLJVK7VFCNOO","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DMCIXLJV","created_at":"2026-05-18T12:30:12Z"}],"graph_snapshots":[{"event_id":"sha256:56c95420d65eba5e4cd715c8513eabf2d5b1f6c4e0cef9d9e29d5c449e973d7e","target":"graph","created_at":"2026-05-18T00:43:18Z","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 demonstrate a quantum nanophotonics platform based on germanium-vacancy (GeV) color centers in fiber-coupled diamond nanophotonic waveguides. We show that GeV optical transitions have a high quantum efficiency and are nearly lifetime-broadened in such nanophotonic structures. These properties yield an efficient interface between waveguide photons and a single GeV without the use of a cavity or slow-light waveguide. As a result, a single GeV center reduces waveguide transmission by $18 \\pm 1\\%$ on resonance in a single pass. We use a nanophotonic interferometer to perform homodyne detection ","authors_text":"Alp Sipahigil, Christian T. Nguyen, Denis D. Sukachev, Fedor Jelezko, Hongkun Park, Lachlan J. Rogers, Marko Lon\\v{c}ar, Mathias H. Metsch, Michael J. Burek, Mihir K. Bhaskar, Mikhail D. Lukin, Petr Siyushev, Ruffin E. Evans","cross_cats":["cond-mat.mes-hall","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-12-09T14:32:58Z","title":"Quantum Nonlinear Optics with a Germanium-Vacancy Color Center in a Nanoscale Diamond Waveguide"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03036","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":"sha256:78e2cee7e69f0f0447c8f9a1a0930a98a7c1b15e652e2c1dbd87c28edeb49bff","target":"record","created_at":"2026-05-18T00:43:18Z","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":"57f263b912482538783fb006aabd38b685982b0484fba90e08be7042575a7563","cross_cats_sorted":["cond-mat.mes-hall","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-12-09T14:32:58Z","title_canon_sha256":"248c9ba83cb7aa831d63de4a66629d9ffa37eab6c72ad48db0bc7ff37b208e0d"},"schema_version":"1.0","source":{"id":"1612.03036","kind":"arxiv","version":3}},"canonical_sha256":"1b048bad3557ea5135ce38bcc18e486e09b882255b44d4558856a31e9df64189","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b048bad3557ea5135ce38bcc18e486e09b882255b44d4558856a31e9df64189","first_computed_at":"2026-05-18T00:43:18.122905Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:18.122905Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N79VRU+v8vInZJs1BDFXxN/HM/JiBeP7TLRA4aWLFkECsc9veHO3MVv6SQxbjFvwrq5u006v/IHyb69sLdLMAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:18.123602Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.03036","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:78e2cee7e69f0f0447c8f9a1a0930a98a7c1b15e652e2c1dbd87c28edeb49bff","sha256:56c95420d65eba5e4cd715c8513eabf2d5b1f6c4e0cef9d9e29d5c449e973d7e"],"state_sha256":"869d6e1c4f046fc5992454160dbb0dd9e4536cc318b423cda7608c8e93d584f7"}