{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:ICEOPMD7NFOEQJMOCVD2R5KZII","short_pith_number":"pith:ICEOPMD7","canonical_record":{"source":{"id":"2303.17412","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-30T14:28:11Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"86223850310280d26876628a52bf2d5237daec8db40850bd3ebda26c7aad8200","abstract_canon_sha256":"67d1efef33eac5fb8266647fa125768c4b275c9030243d114130c68c1e46a478"},"schema_version":"1.0"},"canonical_sha256":"4088e7b07f695c48258e1547a8f55942164dda81f575f591508d7c72ab3420d2","source":{"kind":"arxiv","id":"2303.17412","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.17412","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"arxiv_version","alias_value":"2303.17412v3","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.17412","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"pith_short_12","alias_value":"ICEOPMD7NFOE","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"ICEOPMD7NFOEQJMO","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"ICEOPMD7","created_at":"2026-07-05T06:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:ICEOPMD7NFOEQJMOCVD2R5KZII","target":"record","payload":{"canonical_record":{"source":{"id":"2303.17412","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-30T14:28:11Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"86223850310280d26876628a52bf2d5237daec8db40850bd3ebda26c7aad8200","abstract_canon_sha256":"67d1efef33eac5fb8266647fa125768c4b275c9030243d114130c68c1e46a478"},"schema_version":"1.0"},"canonical_sha256":"4088e7b07f695c48258e1547a8f55942164dda81f575f591508d7c72ab3420d2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:30:44.562241Z","signature_b64":"WWQ8DJ/Vw5jrBQjWBw7skwCLuPlq90vKQjC/UrfCflwGhhhTH5P1Lc1NfELtJ03/kr/rc4qz7HeYYzKhHxQIDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4088e7b07f695c48258e1547a8f55942164dda81f575f591508d7c72ab3420d2","last_reissued_at":"2026-07-05T06:30:44.561743Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:30:44.561743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.17412","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":"2026-07-05T06:30:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g+M7CmmhrhBd9pkTDDVrm81zHj18FtbL164Y42iczKTLHWUP/AQ274i9RzXsKJ9GAwq2fXrB//Uq87Dkt28kAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T07:08:55.671802Z"},"content_sha256":"01135d51fbb02db896028946b9c9cb14d4de8318e9013830b8899ef382de93fe","schema_version":"1.0","event_id":"sha256:01135d51fbb02db896028946b9c9cb14d4de8318e9013830b8899ef382de93fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:ICEOPMD7NFOEQJMOCVD2R5KZII","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Introduction to gravitational redshift of quantum photons propagating in curved spacetime","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"quant-ph","authors_text":"Andreas Wolfgang Schell, David Edward Bruschi, Luis Adri\\'an Alan\\'is Rodr\\'iguez","submitted_at":"2023-03-30T14:28:11Z","abstract_excerpt":"Gravitational redshift is discussed in the context of quantum photons propagating in curved spacetime. A brief introduction to modelling realistic photons is first presented and the effect of gravity on the spectrum computed for photons largely confined along the direction of propagation. It is then shown that redshift-induced transformations on photon operators with sharp momenta are not unitary, while a unitary transformation can be constructed for realistic photons with finite bandwidth. The unitary transformation obtained is then characterized as a multimode mixing operation, which is a ge"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.17412","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/2303.17412/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":"2026-07-05T06:30:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VWwhCWYM5KknddzZfme/vNNXf4z+ykLoj2/rua8x4c/oIC0lnkPfMyvEVXYqOz+34IpUM22qJuvjd5tkSixjDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T07:08:55.672335Z"},"content_sha256":"fb1ab4c90b2348cddadd7d8dcd9f074d99c6d24f5b6473a07902f9d474806054","schema_version":"1.0","event_id":"sha256:fb1ab4c90b2348cddadd7d8dcd9f074d99c6d24f5b6473a07902f9d474806054"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ICEOPMD7NFOEQJMOCVD2R5KZII/bundle.json","state_url":"https://pith.science/pith/ICEOPMD7NFOEQJMOCVD2R5KZII/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ICEOPMD7NFOEQJMOCVD2R5KZII/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":"2026-08-18T07:08:55Z","links":{"resolver":"https://pith.science/pith/ICEOPMD7NFOEQJMOCVD2R5KZII","bundle":"https://pith.science/pith/ICEOPMD7NFOEQJMOCVD2R5KZII/bundle.json","state":"https://pith.science/pith/ICEOPMD7NFOEQJMOCVD2R5KZII/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ICEOPMD7NFOEQJMOCVD2R5KZII/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:ICEOPMD7NFOEQJMOCVD2R5KZII","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":"67d1efef33eac5fb8266647fa125768c4b275c9030243d114130c68c1e46a478","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-30T14:28:11Z","title_canon_sha256":"86223850310280d26876628a52bf2d5237daec8db40850bd3ebda26c7aad8200"},"schema_version":"1.0","source":{"id":"2303.17412","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.17412","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"arxiv_version","alias_value":"2303.17412v3","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.17412","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"pith_short_12","alias_value":"ICEOPMD7NFOE","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"ICEOPMD7NFOEQJMO","created_at":"2026-07-05T06:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"ICEOPMD7","created_at":"2026-07-05T06:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:fb1ab4c90b2348cddadd7d8dcd9f074d99c6d24f5b6473a07902f9d474806054","target":"graph","created_at":"2026-07-05T06:30:44Z","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/2303.17412/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Gravitational redshift is discussed in the context of quantum photons propagating in curved spacetime. A brief introduction to modelling realistic photons is first presented and the effect of gravity on the spectrum computed for photons largely confined along the direction of propagation. It is then shown that redshift-induced transformations on photon operators with sharp momenta are not unitary, while a unitary transformation can be constructed for realistic photons with finite bandwidth. The unitary transformation obtained is then characterized as a multimode mixing operation, which is a ge","authors_text":"Andreas Wolfgang Schell, David Edward Bruschi, Luis Adri\\'an Alan\\'is Rodr\\'iguez","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-30T14:28:11Z","title":"Introduction to gravitational redshift of quantum photons propagating in curved spacetime"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.17412","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":"sha256:01135d51fbb02db896028946b9c9cb14d4de8318e9013830b8899ef382de93fe","target":"record","created_at":"2026-07-05T06:30:44Z","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":"67d1efef33eac5fb8266647fa125768c4b275c9030243d114130c68c1e46a478","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-03-30T14:28:11Z","title_canon_sha256":"86223850310280d26876628a52bf2d5237daec8db40850bd3ebda26c7aad8200"},"schema_version":"1.0","source":{"id":"2303.17412","kind":"arxiv","version":3}},"canonical_sha256":"4088e7b07f695c48258e1547a8f55942164dda81f575f591508d7c72ab3420d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4088e7b07f695c48258e1547a8f55942164dda81f575f591508d7c72ab3420d2","first_computed_at":"2026-07-05T06:30:44.561743Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:30:44.561743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WWQ8DJ/Vw5jrBQjWBw7skwCLuPlq90vKQjC/UrfCflwGhhhTH5P1Lc1NfELtJ03/kr/rc4qz7HeYYzKhHxQIDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T06:30:44.562241Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.17412","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01135d51fbb02db896028946b9c9cb14d4de8318e9013830b8899ef382de93fe","sha256:fb1ab4c90b2348cddadd7d8dcd9f074d99c6d24f5b6473a07902f9d474806054"],"state_sha256":"83e17a02845604998e92c362e245ec8d078349f3a898e6c02755e9fcde28f64b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ajSoZb5MskjKImOR2WcIKhFeE+LSSOhWjfelcAf+fDFSmVsbs0Q5ZVjCXx5lwUUyTB9dzG5qv4HT7tBei5pNCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T07:08:55.677616Z","bundle_sha256":"112fdf29d916cd6f15eea470ef078d8830672726b75ec1e1820913fa4d5a07a7"}}