{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:2SWXP6PDGD4OYYT2EEGYV3F3J5","short_pith_number":"pith:2SWXP6PD","canonical_record":{"source":{"id":"2107.09516","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-20T14:05:42Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"22a561c8ae43bc233983826b0ef8706cc35b1222273ed4466510451f79032045","abstract_canon_sha256":"e75f11e6382bc5b03666be018fba06a79c20b4697af8c332a71163b45739d8a6"},"schema_version":"1.0"},"canonical_sha256":"d4ad77f9e330f8ec627a210d8aecbb4f78bd7df1c6f2040da694e87eb8b977de","source":{"kind":"arxiv","id":"2107.09516","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.09516","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"arxiv_version","alias_value":"2107.09516v1","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.09516","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"pith_short_12","alias_value":"2SWXP6PDGD4O","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"pith_short_16","alias_value":"2SWXP6PDGD4OYYT2","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"pith_short_8","alias_value":"2SWXP6PD","created_at":"2026-07-05T02:59:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:2SWXP6PDGD4OYYT2EEGYV3F3J5","target":"record","payload":{"canonical_record":{"source":{"id":"2107.09516","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-20T14:05:42Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"22a561c8ae43bc233983826b0ef8706cc35b1222273ed4466510451f79032045","abstract_canon_sha256":"e75f11e6382bc5b03666be018fba06a79c20b4697af8c332a71163b45739d8a6"},"schema_version":"1.0"},"canonical_sha256":"d4ad77f9e330f8ec627a210d8aecbb4f78bd7df1c6f2040da694e87eb8b977de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:59:31.976717Z","signature_b64":"5pU+UydcNM4kTY7HR4VCXFIjUTLqL17IjF+Ln+neHQcLHsGGphaqH54ikyl0MKnGPn4qF2DP3UKg8aGjDtAJAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4ad77f9e330f8ec627a210d8aecbb4f78bd7df1c6f2040da694e87eb8b977de","last_reissued_at":"2026-07-05T02:59:31.976270Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:59:31.976270Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.09516","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":"2026-07-05T02:59:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4tfhKYm3RBsnq7A8GO36cPwbkiqjAyoDhnEAGE9zbCsQFS5VMAxjX4YOtd1PRYPud97x6qHQVJUc4PlX3byZCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T13:40:32.173042Z"},"content_sha256":"518ee755086b631c518a32d00f98fe8f871208ad1bdd54e31506d046e2f62f86","schema_version":"1.0","event_id":"sha256:518ee755086b631c518a32d00f98fe8f871208ad1bdd54e31506d046e2f62f86"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:2SWXP6PDGD4OYYT2EEGYV3F3J5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Single-photon non-reciprocity with an integrated magneto-optical isolator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Bo-Yu Xu, Guang-Can Guo, Lan-Tian Feng, Lei Bi, Long-Jiang Deng, Shang-Yu Ren, Wei Yan, Xiao-JingLiu, Xiao-Zhuo Qi, Xi-Feng Ren, Yang Chen, Yu-Jie Cheng, Yun-Kun Wu","submitted_at":"2021-07-20T14:05:42Z","abstract_excerpt":"Non-reciprocal photonic devices are essential components of classical optical information processing. It is interesting and important to investigate their feasibility in the quantum world. In this work, the quantum properties of an on-chip silicon nitride (SiN)-based magneto-optical (MO) isolator were studied using a single-photon non-reciprocal dynamical transmission experiment. The measured isolation ratio for single photons achieved was 12.33 dB, which proved the functionality of our on-chip isolator. The quantum coherence of the passing single photons was further verified using high-visibi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.09516","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.09516/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:59:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rXwKZ9D4cjPcETAdMIU89Sa2NI63z+A2tUW36C2ywYR9lrtMopsllFjDrHqBRrbO2/yHS5uXwa+D0SvRVyTJBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T13:40:32.173649Z"},"content_sha256":"f3068683b4017208bc0606d54cbe8e5a4ff2b56fc042cbf94858688bffeeb40b","schema_version":"1.0","event_id":"sha256:f3068683b4017208bc0606d54cbe8e5a4ff2b56fc042cbf94858688bffeeb40b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2SWXP6PDGD4OYYT2EEGYV3F3J5/bundle.json","state_url":"https://pith.science/pith/2SWXP6PDGD4OYYT2EEGYV3F3J5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2SWXP6PDGD4OYYT2EEGYV3F3J5/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":"2026-07-06T13:40:32Z","links":{"resolver":"https://pith.science/pith/2SWXP6PDGD4OYYT2EEGYV3F3J5","bundle":"https://pith.science/pith/2SWXP6PDGD4OYYT2EEGYV3F3J5/bundle.json","state":"https://pith.science/pith/2SWXP6PDGD4OYYT2EEGYV3F3J5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2SWXP6PDGD4OYYT2EEGYV3F3J5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:2SWXP6PDGD4OYYT2EEGYV3F3J5","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":"e75f11e6382bc5b03666be018fba06a79c20b4697af8c332a71163b45739d8a6","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-20T14:05:42Z","title_canon_sha256":"22a561c8ae43bc233983826b0ef8706cc35b1222273ed4466510451f79032045"},"schema_version":"1.0","source":{"id":"2107.09516","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.09516","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"arxiv_version","alias_value":"2107.09516v1","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.09516","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"pith_short_12","alias_value":"2SWXP6PDGD4O","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"pith_short_16","alias_value":"2SWXP6PDGD4OYYT2","created_at":"2026-07-05T02:59:31Z"},{"alias_kind":"pith_short_8","alias_value":"2SWXP6PD","created_at":"2026-07-05T02:59:31Z"}],"graph_snapshots":[{"event_id":"sha256:f3068683b4017208bc0606d54cbe8e5a4ff2b56fc042cbf94858688bffeeb40b","target":"graph","created_at":"2026-07-05T02:59:31Z","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/2107.09516/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Non-reciprocal photonic devices are essential components of classical optical information processing. It is interesting and important to investigate their feasibility in the quantum world. In this work, the quantum properties of an on-chip silicon nitride (SiN)-based magneto-optical (MO) isolator were studied using a single-photon non-reciprocal dynamical transmission experiment. The measured isolation ratio for single photons achieved was 12.33 dB, which proved the functionality of our on-chip isolator. The quantum coherence of the passing single photons was further verified using high-visibi","authors_text":"Bo-Yu Xu, Guang-Can Guo, Lan-Tian Feng, Lei Bi, Long-Jiang Deng, Shang-Yu Ren, Wei Yan, Xiao-JingLiu, Xiao-Zhuo Qi, Xi-Feng Ren, Yang Chen, Yu-Jie Cheng, Yun-Kun Wu","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-20T14:05:42Z","title":"Single-photon non-reciprocity with an integrated magneto-optical isolator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.09516","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":"sha256:518ee755086b631c518a32d00f98fe8f871208ad1bdd54e31506d046e2f62f86","target":"record","created_at":"2026-07-05T02:59:31Z","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":"e75f11e6382bc5b03666be018fba06a79c20b4697af8c332a71163b45739d8a6","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-07-20T14:05:42Z","title_canon_sha256":"22a561c8ae43bc233983826b0ef8706cc35b1222273ed4466510451f79032045"},"schema_version":"1.0","source":{"id":"2107.09516","kind":"arxiv","version":1}},"canonical_sha256":"d4ad77f9e330f8ec627a210d8aecbb4f78bd7df1c6f2040da694e87eb8b977de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d4ad77f9e330f8ec627a210d8aecbb4f78bd7df1c6f2040da694e87eb8b977de","first_computed_at":"2026-07-05T02:59:31.976270Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:59:31.976270Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5pU+UydcNM4kTY7HR4VCXFIjUTLqL17IjF+Ln+neHQcLHsGGphaqH54ikyl0MKnGPn4qF2DP3UKg8aGjDtAJAg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:59:31.976717Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.09516","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:518ee755086b631c518a32d00f98fe8f871208ad1bdd54e31506d046e2f62f86","sha256:f3068683b4017208bc0606d54cbe8e5a4ff2b56fc042cbf94858688bffeeb40b"],"state_sha256":"212931366f603c367a6e84b0e93907177825bf70d2dadfd8caa6d0c3c2646427"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MfrVdZpIVZjCgQrji+pCk88TYt7rRzDuCPyJMI3uEb2TD1+9r66ACAShG+ir+rpgptv/fJK16LAqq5bX5u9ABQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T13:40:32.177617Z","bundle_sha256":"fa8a7d827fa135b0c5057fed8a8ea48a2346db6ca94a74f4ca56c80c31583533"}}