{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:AYEHUEX6CM2UPRO2WKL4XMHRAV","short_pith_number":"pith:AYEHUEX6","canonical_record":{"source":{"id":"2507.15644","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-07-21T14:07:36Z","cross_cats_sorted":[],"title_canon_sha256":"2653047e376edf108c2f6e14354ee8ba5ff7167c39b391239918466e3dcde31f","abstract_canon_sha256":"ce267b6f43834b7e496fe305a5875823d4f3e5705e2fe055fadf382e60f9333a"},"schema_version":"1.0"},"canonical_sha256":"06087a12fe133547c5dab297cbb0f1056e23fd4f6a8206def08e6da6638a4d1c","source":{"kind":"arxiv","id":"2507.15644","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.15644","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"arxiv_version","alias_value":"2507.15644v1","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.15644","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"pith_short_12","alias_value":"AYEHUEX6CM2U","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"pith_short_16","alias_value":"AYEHUEX6CM2UPRO2","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"pith_short_8","alias_value":"AYEHUEX6","created_at":"2026-07-05T11:40:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:AYEHUEX6CM2UPRO2WKL4XMHRAV","target":"record","payload":{"canonical_record":{"source":{"id":"2507.15644","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-07-21T14:07:36Z","cross_cats_sorted":[],"title_canon_sha256":"2653047e376edf108c2f6e14354ee8ba5ff7167c39b391239918466e3dcde31f","abstract_canon_sha256":"ce267b6f43834b7e496fe305a5875823d4f3e5705e2fe055fadf382e60f9333a"},"schema_version":"1.0"},"canonical_sha256":"06087a12fe133547c5dab297cbb0f1056e23fd4f6a8206def08e6da6638a4d1c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:40:41.190602Z","signature_b64":"bT3d0XjHcXaHC9vQBc2tcaR/xY2IDqOPkRDIyB/oD+HeUZyBH6nVwE2Q0LGTI8tk7gtR3PU6jk63rCw/kk8tCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"06087a12fe133547c5dab297cbb0f1056e23fd4f6a8206def08e6da6638a4d1c","last_reissued_at":"2026-07-05T11:40:41.190086Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:40:41.190086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.15644","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":"2026-07-05T11:40:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yWoGi2+IC1WF0s9u0AbrrGEUOa+Mthizu8gsJJ8I/YU39kgSXky7lr0krn8qCvOaTpwnxZkD1eGvZQWTLfJ7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T03:56:29.133510Z"},"content_sha256":"3a286e356317a70fb6beb53a3cdbade39430ed224d09c6f87fd8575a58d51afa","schema_version":"1.0","event_id":"sha256:3a286e356317a70fb6beb53a3cdbade39430ed224d09c6f87fd8575a58d51afa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:AYEHUEX6CM2UPRO2WKL4XMHRAV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photonic time crystals assisted by quasi-bound states in the continuum","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"C. Rockstuhl, E. Almpanis, J. D. Fischbach, L. Zimmer, M. Nyman, M. S. Mirmoosa, N. Papanikolaou, N. Stefanou, P. Garg, V. Asadchy, X. Wang","submitted_at":"2025-07-21T14:07:36Z","abstract_excerpt":"Photonic time crystals are a class of artificial materials that have only recently been explored. They are characterized by the ultrafast modulation of the material properties in time, causing a momentum bandgap for light that propagates through such novel states of matter. However, the observation of these unique properties at optical frequencies remains elusive, as the necessary modulation amplitudes of the permittivity to show notable momentum bandgaps are relatively high, inaccessible with available materials. While it has been known that structuring photonic time crystals at the sub-wavel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.15644","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/2507.15644/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":"2026-07-05T11:40:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ldHlCbOs4AUyywiADcFYNFKDQJW8eEaz1TgOShbBBFfbrUn9moZs5X2NgaL+uQjq/LLcxezkcuFfv0lOZtFRAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T03:56:29.133885Z"},"content_sha256":"929491c73f2d5821a19f31e323060db1be03ff95ec237587d378c110fdd44758","schema_version":"1.0","event_id":"sha256:929491c73f2d5821a19f31e323060db1be03ff95ec237587d378c110fdd44758"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AYEHUEX6CM2UPRO2WKL4XMHRAV/bundle.json","state_url":"https://pith.science/pith/AYEHUEX6CM2UPRO2WKL4XMHRAV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AYEHUEX6CM2UPRO2WKL4XMHRAV/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":"2026-07-09T03:56:29Z","links":{"resolver":"https://pith.science/pith/AYEHUEX6CM2UPRO2WKL4XMHRAV","bundle":"https://pith.science/pith/AYEHUEX6CM2UPRO2WKL4XMHRAV/bundle.json","state":"https://pith.science/pith/AYEHUEX6CM2UPRO2WKL4XMHRAV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AYEHUEX6CM2UPRO2WKL4XMHRAV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:AYEHUEX6CM2UPRO2WKL4XMHRAV","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":"ce267b6f43834b7e496fe305a5875823d4f3e5705e2fe055fadf382e60f9333a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-07-21T14:07:36Z","title_canon_sha256":"2653047e376edf108c2f6e14354ee8ba5ff7167c39b391239918466e3dcde31f"},"schema_version":"1.0","source":{"id":"2507.15644","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.15644","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"arxiv_version","alias_value":"2507.15644v1","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.15644","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"pith_short_12","alias_value":"AYEHUEX6CM2U","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"pith_short_16","alias_value":"AYEHUEX6CM2UPRO2","created_at":"2026-07-05T11:40:41Z"},{"alias_kind":"pith_short_8","alias_value":"AYEHUEX6","created_at":"2026-07-05T11:40:41Z"}],"graph_snapshots":[{"event_id":"sha256:929491c73f2d5821a19f31e323060db1be03ff95ec237587d378c110fdd44758","target":"graph","created_at":"2026-07-05T11:40:41Z","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/2507.15644/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Photonic time crystals are a class of artificial materials that have only recently been explored. They are characterized by the ultrafast modulation of the material properties in time, causing a momentum bandgap for light that propagates through such novel states of matter. However, the observation of these unique properties at optical frequencies remains elusive, as the necessary modulation amplitudes of the permittivity to show notable momentum bandgaps are relatively high, inaccessible with available materials. While it has been known that structuring photonic time crystals at the sub-wavel","authors_text":"C. Rockstuhl, E. Almpanis, J. D. Fischbach, L. Zimmer, M. Nyman, M. S. Mirmoosa, N. Papanikolaou, N. Stefanou, P. Garg, V. Asadchy, X. Wang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-07-21T14:07:36Z","title":"Photonic time crystals assisted by quasi-bound states in the continuum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.15644","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":"sha256:3a286e356317a70fb6beb53a3cdbade39430ed224d09c6f87fd8575a58d51afa","target":"record","created_at":"2026-07-05T11:40:41Z","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":"ce267b6f43834b7e496fe305a5875823d4f3e5705e2fe055fadf382e60f9333a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-07-21T14:07:36Z","title_canon_sha256":"2653047e376edf108c2f6e14354ee8ba5ff7167c39b391239918466e3dcde31f"},"schema_version":"1.0","source":{"id":"2507.15644","kind":"arxiv","version":1}},"canonical_sha256":"06087a12fe133547c5dab297cbb0f1056e23fd4f6a8206def08e6da6638a4d1c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"06087a12fe133547c5dab297cbb0f1056e23fd4f6a8206def08e6da6638a4d1c","first_computed_at":"2026-07-05T11:40:41.190086Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:40:41.190086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bT3d0XjHcXaHC9vQBc2tcaR/xY2IDqOPkRDIyB/oD+HeUZyBH6nVwE2Q0LGTI8tk7gtR3PU6jk63rCw/kk8tCA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:40:41.190602Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.15644","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a286e356317a70fb6beb53a3cdbade39430ed224d09c6f87fd8575a58d51afa","sha256:929491c73f2d5821a19f31e323060db1be03ff95ec237587d378c110fdd44758"],"state_sha256":"632ca5c7a5b6d31e75e40a946ebfaddf220606c321a8cf73a31a952cb2f81382"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J1jE033wBIetyzHWddaG/oNWVGQLSfBFGj3VNKTkQA+l4FvcKiUAgaW/UDqrnSwd2ctwaPXmdQbq+383RmNPBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T03:56:29.135824Z","bundle_sha256":"1fa83780e9396acfeede1eba3b825cd6d31632106ecc6d0b2bca3eeb780bc9f7"}}