{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:TRO6JLUXZWKJTOXUBHK6BNEYHH","short_pith_number":"pith:TRO6JLUX","canonical_record":{"source":{"id":"2511.00526","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-11-01T12:04:27Z","cross_cats_sorted":[],"title_canon_sha256":"86f954485cdbcc11fdf81c4c6ffeee38c447ea71e2cff68eb2fea3dac87d7557","abstract_canon_sha256":"9d690aa2d21b55a4e72bd3f7df5982351027b660c82e1a1e789d77937cd5b1da"},"schema_version":"1.0"},"canonical_sha256":"9c5de4ae97cd9499baf409d5e0b49839df8809d049750493afa8aa3b1a703a98","source":{"kind":"arxiv","id":"2511.00526","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2511.00526","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"2511.00526v3","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2511.00526","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"TRO6JLUXZWKJ","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"pith_short_16","alias_value":"TRO6JLUXZWKJTOXU","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"pith_short_8","alias_value":"TRO6JLUX","created_at":"2026-07-10T01:19:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:TRO6JLUXZWKJTOXUBHK6BNEYHH","target":"record","payload":{"canonical_record":{"source":{"id":"2511.00526","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-11-01T12:04:27Z","cross_cats_sorted":[],"title_canon_sha256":"86f954485cdbcc11fdf81c4c6ffeee38c447ea71e2cff68eb2fea3dac87d7557","abstract_canon_sha256":"9d690aa2d21b55a4e72bd3f7df5982351027b660c82e1a1e789d77937cd5b1da"},"schema_version":"1.0"},"canonical_sha256":"9c5de4ae97cd9499baf409d5e0b49839df8809d049750493afa8aa3b1a703a98","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-10T01:19:40.327605Z","signature_b64":"Cye66oGU84JeHzJxLa0UdZ6XwilejKZp9LzKov28r6LJcKmDF0kZcmM4dEmpg9JUBJjMKcs9f6IavmNHZmvYCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9c5de4ae97cd9499baf409d5e0b49839df8809d049750493afa8aa3b1a703a98","last_reissued_at":"2026-07-10T01:19:40.327065Z","signature_status":"signed_v1","first_computed_at":"2026-07-10T01:19:40.327065Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2511.00526","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-10T01:19:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gEXXaHJMxztDChUvP+kzFchZeDFZvlm03ir8tG2g5JAqowP8nrqbOvs4ffoomD9FpexRo0gQH8WrNxMxAgttDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T14:08:38.719568Z"},"content_sha256":"295e5774a1bd96939e41072d5cf5128b856fd6a92ab3b1a5c8b2b8d01eb8279c","schema_version":"1.0","event_id":"sha256:295e5774a1bd96939e41072d5cf5128b856fd6a92ab3b1a5c8b2b8d01eb8279c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:TRO6JLUXZWKJTOXUBHK6BNEYHH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Determination of atomic number density in MEMS vapor cells via single-pass absorption spectroscopy (SPAS)","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Arijit Sharma, Chandankumar R, Ezhilarasan M, Shivam Sinha, Sumit Achar","submitted_at":"2025-11-01T12:04:27Z","abstract_excerpt":"Micro-electro-mechanical systems (MEMS)-based (chip-scale) alkali vapor cells are key components in emerging quantum technologies, where device performance critically depends on the atomic number density. Thus, it is important to have an accurate estimate of the atomic number density in MEMS-based alkali vapor cells to optimize light-matter interactions and design efficient quantum sensing systems. Here, a quantitatively validated method is presented for determining the rubidium (Rb) atomic number density in warm vapor using Single-Pass Absorption Spectroscopy (SPAS). The absolute transmission"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2511.00526","kind":"arxiv","version":3},"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/2511.00526/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":"2026-07-10T01:19:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xtYJAYVMJIYIYNOq19tfoZLjT6XFkJ4qlMmMHyO9svdUXyUqKdd7MRbVemQy4dJTrbYSS3PKeS7CosyRqgXPBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T14:08:38.720077Z"},"content_sha256":"a2da0a188a0a1c80974c1739fc7d5ef087327d3fb6ce2a3ced2c4b9571001959","schema_version":"1.0","event_id":"sha256:a2da0a188a0a1c80974c1739fc7d5ef087327d3fb6ce2a3ced2c4b9571001959"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TRO6JLUXZWKJTOXUBHK6BNEYHH/bundle.json","state_url":"https://pith.science/pith/TRO6JLUXZWKJTOXUBHK6BNEYHH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TRO6JLUXZWKJTOXUBHK6BNEYHH/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":"2026-08-04T14:08:38Z","links":{"resolver":"https://pith.science/pith/TRO6JLUXZWKJTOXUBHK6BNEYHH","bundle":"https://pith.science/pith/TRO6JLUXZWKJTOXUBHK6BNEYHH/bundle.json","state":"https://pith.science/pith/TRO6JLUXZWKJTOXUBHK6BNEYHH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TRO6JLUXZWKJTOXUBHK6BNEYHH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:TRO6JLUXZWKJTOXUBHK6BNEYHH","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":"9d690aa2d21b55a4e72bd3f7df5982351027b660c82e1a1e789d77937cd5b1da","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-11-01T12:04:27Z","title_canon_sha256":"86f954485cdbcc11fdf81c4c6ffeee38c447ea71e2cff68eb2fea3dac87d7557"},"schema_version":"1.0","source":{"id":"2511.00526","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2511.00526","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"arxiv_version","alias_value":"2511.00526v3","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2511.00526","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"pith_short_12","alias_value":"TRO6JLUXZWKJ","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"pith_short_16","alias_value":"TRO6JLUXZWKJTOXU","created_at":"2026-07-10T01:19:40Z"},{"alias_kind":"pith_short_8","alias_value":"TRO6JLUX","created_at":"2026-07-10T01:19:40Z"}],"graph_snapshots":[{"event_id":"sha256:a2da0a188a0a1c80974c1739fc7d5ef087327d3fb6ce2a3ced2c4b9571001959","target":"graph","created_at":"2026-07-10T01:19:40Z","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/2511.00526/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Micro-electro-mechanical systems (MEMS)-based (chip-scale) alkali vapor cells are key components in emerging quantum technologies, where device performance critically depends on the atomic number density. Thus, it is important to have an accurate estimate of the atomic number density in MEMS-based alkali vapor cells to optimize light-matter interactions and design efficient quantum sensing systems. Here, a quantitatively validated method is presented for determining the rubidium (Rb) atomic number density in warm vapor using Single-Pass Absorption Spectroscopy (SPAS). The absolute transmission","authors_text":"Arijit Sharma, Chandankumar R, Ezhilarasan M, Shivam Sinha, Sumit Achar","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-11-01T12:04:27Z","title":"Determination of atomic number density in MEMS vapor cells via single-pass absorption spectroscopy (SPAS)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2511.00526","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":"sha256:295e5774a1bd96939e41072d5cf5128b856fd6a92ab3b1a5c8b2b8d01eb8279c","target":"record","created_at":"2026-07-10T01:19:40Z","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":"9d690aa2d21b55a4e72bd3f7df5982351027b660c82e1a1e789d77937cd5b1da","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-11-01T12:04:27Z","title_canon_sha256":"86f954485cdbcc11fdf81c4c6ffeee38c447ea71e2cff68eb2fea3dac87d7557"},"schema_version":"1.0","source":{"id":"2511.00526","kind":"arxiv","version":3}},"canonical_sha256":"9c5de4ae97cd9499baf409d5e0b49839df8809d049750493afa8aa3b1a703a98","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9c5de4ae97cd9499baf409d5e0b49839df8809d049750493afa8aa3b1a703a98","first_computed_at":"2026-07-10T01:19:40.327065Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-10T01:19:40.327065Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Cye66oGU84JeHzJxLa0UdZ6XwilejKZp9LzKov28r6LJcKmDF0kZcmM4dEmpg9JUBJjMKcs9f6IavmNHZmvYCg==","signature_status":"signed_v1","signed_at":"2026-07-10T01:19:40.327605Z","signed_message":"canonical_sha256_bytes"},"source_id":"2511.00526","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:295e5774a1bd96939e41072d5cf5128b856fd6a92ab3b1a5c8b2b8d01eb8279c","sha256:a2da0a188a0a1c80974c1739fc7d5ef087327d3fb6ce2a3ced2c4b9571001959"],"state_sha256":"44b7f391cd593a2c919de91abc09cbd68fa07a31fe4827b1b182f22a69e09e94"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Go7gIfU8kHHZvDYmNA/FZOn+gaYkDGTtmBJB48TF1s7aEI3FFjgbZW9MKTFsukbO2pglayqzMIVz0B8CmmOnDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T14:08:38.748862Z","bundle_sha256":"f4de8758317fe81be0030bf693fcadb403b440f792dd67a84640e268b10ef067"}}