{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:BNFTNYF7HICVIXG5537WJUYQQH","short_pith_number":"pith:BNFTNYF7","canonical_record":{"source":{"id":"2202.13154","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-02-26T15:02:00Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"80696491003dd801609af1375bf6761c7f7c58ca80aef71c0ee39071c3fff755","abstract_canon_sha256":"f50f3c159505da77c3ac9287207f921212b35aabc1d7fa7beee6031194beaf2d"},"schema_version":"1.0"},"canonical_sha256":"0b4b36e0bf3a05545cddeeff64d31081d022fb97dcbfc692613864cc9eb4f17f","source":{"kind":"arxiv","id":"2202.13154","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.13154","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"arxiv_version","alias_value":"2202.13154v1","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.13154","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"pith_short_12","alias_value":"BNFTNYF7HICV","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"pith_short_16","alias_value":"BNFTNYF7HICVIXG5","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"pith_short_8","alias_value":"BNFTNYF7","created_at":"2026-07-05T05:39:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:BNFTNYF7HICVIXG5537WJUYQQH","target":"record","payload":{"canonical_record":{"source":{"id":"2202.13154","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-02-26T15:02:00Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"80696491003dd801609af1375bf6761c7f7c58ca80aef71c0ee39071c3fff755","abstract_canon_sha256":"f50f3c159505da77c3ac9287207f921212b35aabc1d7fa7beee6031194beaf2d"},"schema_version":"1.0"},"canonical_sha256":"0b4b36e0bf3a05545cddeeff64d31081d022fb97dcbfc692613864cc9eb4f17f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:39:50.163103Z","signature_b64":"L3zqLiAUj19xTGx96LDTDJ7rlBVDkp+irsu8IZoGJw4s//Y3Tw2Zp5/V7wbCYRCP2wGo04AQe1WNBhEmtd/RDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b4b36e0bf3a05545cddeeff64d31081d022fb97dcbfc692613864cc9eb4f17f","last_reissued_at":"2026-07-05T05:39:50.162659Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:39:50.162659Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2202.13154","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":"2026-07-05T05:39:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5bjRV51t6fyY5bojekSBY0oNv8t9wZj2fL0rozuwrBw9G7KU3Bi4ORS98oBDK0t0vN+iHYixx2u+T/9a6eobCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T08:21:23.543401Z"},"content_sha256":"be2d7af5fb4c452559b6bf4d96b55bf3094e2206e4e9709fcac11e6fccac4585","schema_version":"1.0","event_id":"sha256:be2d7af5fb4c452559b6bf4d96b55bf3094e2206e4e9709fcac11e6fccac4585"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:BNFTNYF7HICVIXG5537WJUYQQH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On-chip mechanical exceptional points based on an optomechanical zipper cavity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.optics","authors_text":"Fang Liu, Kaiyu Cui, Ning Wu, Qiancheng Xu, Wei Zhang, Xue Feng, Yidong Huang","submitted_at":"2022-02-26T15:02:00Z","abstract_excerpt":"Exceptional points (EPs) represent a distinct type of spectral singularity in non-Hermitian systems, and intriguing physics concepts have been studied with optical EPs recently. As a system beyond photonics, the mechanical oscillators coupling with many physical systems are expected to be further exploited EPs for mechanical sensing, topology energy transfer, nonreciprocal dynamics etc. In this study, we demonstrated on-chip mechanical EPs with a silicon optomechanical zipper cavity, wherein two near-degenerate mechanical breathing modes are coupled via a single co-localized optical mode. By t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.13154","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/2202.13154/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":"2026-07-05T05:39:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zfftMe/xoLXwwuxGbVTDoi/HdoUXPCUqujdrUu+GuFZYraMgonoc/vzFmHVOMv0CJn88z+YdbOJM57cQmxpuAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T08:21:23.544210Z"},"content_sha256":"792f18bceabe96b5194c3339d96a9cee86900c5bebff050d768a65a38e3cbe42","schema_version":"1.0","event_id":"sha256:792f18bceabe96b5194c3339d96a9cee86900c5bebff050d768a65a38e3cbe42"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BNFTNYF7HICVIXG5537WJUYQQH/bundle.json","state_url":"https://pith.science/pith/BNFTNYF7HICVIXG5537WJUYQQH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BNFTNYF7HICVIXG5537WJUYQQH/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":"2026-08-09T08:21:23Z","links":{"resolver":"https://pith.science/pith/BNFTNYF7HICVIXG5537WJUYQQH","bundle":"https://pith.science/pith/BNFTNYF7HICVIXG5537WJUYQQH/bundle.json","state":"https://pith.science/pith/BNFTNYF7HICVIXG5537WJUYQQH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BNFTNYF7HICVIXG5537WJUYQQH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:BNFTNYF7HICVIXG5537WJUYQQH","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":"f50f3c159505da77c3ac9287207f921212b35aabc1d7fa7beee6031194beaf2d","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-02-26T15:02:00Z","title_canon_sha256":"80696491003dd801609af1375bf6761c7f7c58ca80aef71c0ee39071c3fff755"},"schema_version":"1.0","source":{"id":"2202.13154","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.13154","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"arxiv_version","alias_value":"2202.13154v1","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.13154","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"pith_short_12","alias_value":"BNFTNYF7HICV","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"pith_short_16","alias_value":"BNFTNYF7HICVIXG5","created_at":"2026-07-05T05:39:50Z"},{"alias_kind":"pith_short_8","alias_value":"BNFTNYF7","created_at":"2026-07-05T05:39:50Z"}],"graph_snapshots":[{"event_id":"sha256:792f18bceabe96b5194c3339d96a9cee86900c5bebff050d768a65a38e3cbe42","target":"graph","created_at":"2026-07-05T05:39:50Z","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/2202.13154/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Exceptional points (EPs) represent a distinct type of spectral singularity in non-Hermitian systems, and intriguing physics concepts have been studied with optical EPs recently. As a system beyond photonics, the mechanical oscillators coupling with many physical systems are expected to be further exploited EPs for mechanical sensing, topology energy transfer, nonreciprocal dynamics etc. In this study, we demonstrated on-chip mechanical EPs with a silicon optomechanical zipper cavity, wherein two near-degenerate mechanical breathing modes are coupled via a single co-localized optical mode. By t","authors_text":"Fang Liu, Kaiyu Cui, Ning Wu, Qiancheng Xu, Wei Zhang, Xue Feng, Yidong Huang","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-02-26T15:02:00Z","title":"On-chip mechanical exceptional points based on an optomechanical zipper cavity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.13154","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:be2d7af5fb4c452559b6bf4d96b55bf3094e2206e4e9709fcac11e6fccac4585","target":"record","created_at":"2026-07-05T05:39:50Z","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":"f50f3c159505da77c3ac9287207f921212b35aabc1d7fa7beee6031194beaf2d","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-02-26T15:02:00Z","title_canon_sha256":"80696491003dd801609af1375bf6761c7f7c58ca80aef71c0ee39071c3fff755"},"schema_version":"1.0","source":{"id":"2202.13154","kind":"arxiv","version":1}},"canonical_sha256":"0b4b36e0bf3a05545cddeeff64d31081d022fb97dcbfc692613864cc9eb4f17f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0b4b36e0bf3a05545cddeeff64d31081d022fb97dcbfc692613864cc9eb4f17f","first_computed_at":"2026-07-05T05:39:50.162659Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:39:50.162659Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"L3zqLiAUj19xTGx96LDTDJ7rlBVDkp+irsu8IZoGJw4s//Y3Tw2Zp5/V7wbCYRCP2wGo04AQe1WNBhEmtd/RDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T05:39:50.163103Z","signed_message":"canonical_sha256_bytes"},"source_id":"2202.13154","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be2d7af5fb4c452559b6bf4d96b55bf3094e2206e4e9709fcac11e6fccac4585","sha256:792f18bceabe96b5194c3339d96a9cee86900c5bebff050d768a65a38e3cbe42"],"state_sha256":"c9b4c4b4e6e5784f5984388f57514f285beed6b797c3969635feeaf052c63cb5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jp4PVholSXwFA6EJOZZiZlY703LJJuo7PYMPIN/7DlHoGPAMo7MAeAyhhGl/tVPUS07pg+Ciq1sBHzSiph92Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T08:21:23.550684Z","bundle_sha256":"526b21d0bca4478703347cc992784e474b403135599c83c08127c2eb3cabc9a2"}}