{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:5MR7DA7OBU4RW2LUJ4JCS2BBEE","short_pith_number":"pith:5MR7DA7O","canonical_record":{"source":{"id":"2606.02619","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2026-05-27T20:13:27Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"5c0b3041b8c0250e8b9c82b20526e5b58afd7de029d59b81e609a8a9436545f3","abstract_canon_sha256":"90738fc4ec7babd036ef1baffa5f53eb7b511beefb8ca8d3413c24a295b405ef"},"schema_version":"1.0"},"canonical_sha256":"eb23f183ee0d391b69744f12296821211cc8990010decd37c6eec1c132679adb","source":{"kind":"arxiv","id":"2606.02619","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.02619","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"arxiv_version","alias_value":"2606.02619v1","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.02619","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"pith_short_12","alias_value":"5MR7DA7OBU4R","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"pith_short_16","alias_value":"5MR7DA7OBU4RW2LU","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"pith_short_8","alias_value":"5MR7DA7O","created_at":"2026-06-03T00:05:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:5MR7DA7OBU4RW2LUJ4JCS2BBEE","target":"record","payload":{"canonical_record":{"source":{"id":"2606.02619","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2026-05-27T20:13:27Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"5c0b3041b8c0250e8b9c82b20526e5b58afd7de029d59b81e609a8a9436545f3","abstract_canon_sha256":"90738fc4ec7babd036ef1baffa5f53eb7b511beefb8ca8d3413c24a295b405ef"},"schema_version":"1.0"},"canonical_sha256":"eb23f183ee0d391b69744f12296821211cc8990010decd37c6eec1c132679adb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-03T00:05:04.878423Z","signature_b64":"F5etdTL44BtSIlwlxx9LBZ8pw8uqjLPDHmG6F+0hh/+7EJaW4riUzLZ5QwnMPGF6AVXbIVZJtK6CGHjxTPNgAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eb23f183ee0d391b69744f12296821211cc8990010decd37c6eec1c132679adb","last_reissued_at":"2026-06-03T00:05:04.877966Z","signature_status":"signed_v1","first_computed_at":"2026-06-03T00:05:04.877966Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.02619","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":"2026-06-03T00:05:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yp+wsJCqFU08ApYJE3f3hktAS7l1aS2gNaBjkyU875aFMdOjD6L/OmzHPD2O9sA/tRHrqmwQeiZ7a7DyXO+LAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T10:11:25.011242Z"},"content_sha256":"3bc69bbaa6cc82e5360ac484fec08703c8244060cbdca000d32973192004df42","schema_version":"1.0","event_id":"sha256:3bc69bbaa6cc82e5360ac484fec08703c8244060cbdca000d32973192004df42"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:5MR7DA7OBU4RW2LUJ4JCS2BBEE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polariton spectroscopy at the diamond K-edge via X-ray parametric down-conversion","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"physics.ins-det","authors_text":"Ankita Negi, Blanka Detlefs, Christina Boemer, Christoph J. Sahle, Dietrich Krebs, Fridtjof Kerker, Xenia Brockm\\\"uller","submitted_at":"2026-05-27T20:13:27Z","abstract_excerpt":"It has recently been shown that x-ray parametric down-conversion (XPDC) provides access to high-energy polaritons, resulting from the hybridization of down-converted photons with electronic excitations in a nonlinear medium. Here, we present a spectrally resolved study of this effect around the K-shell absorption edge in diamond. Our results exhibit pronounced signatures of polaritonic hybridization, which we visualize by introducing a polariton spectral map and analyze by help of theoretical modelling. We find that the hybridization at this absorption edge results in substantially higher coup"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.02619","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/2606.02619/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":"2026-06-03T00:05:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/TO8QOQqLWgboN5FpLhHmyBnq+fKNAUHl6UfI4MVWA0SgZW4u36NOEx183xKC7ZEgfur1mkqwdEO0kkYtVDfAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T10:11:25.011660Z"},"content_sha256":"6c517f8e71ce8c3683668ba88b4adf124de39fb8d264f2a112eb7de82f5496ea","schema_version":"1.0","event_id":"sha256:6c517f8e71ce8c3683668ba88b4adf124de39fb8d264f2a112eb7de82f5496ea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5MR7DA7OBU4RW2LUJ4JCS2BBEE/bundle.json","state_url":"https://pith.science/pith/5MR7DA7OBU4RW2LUJ4JCS2BBEE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5MR7DA7OBU4RW2LUJ4JCS2BBEE/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":"2026-06-09T10:11:25Z","links":{"resolver":"https://pith.science/pith/5MR7DA7OBU4RW2LUJ4JCS2BBEE","bundle":"https://pith.science/pith/5MR7DA7OBU4RW2LUJ4JCS2BBEE/bundle.json","state":"https://pith.science/pith/5MR7DA7OBU4RW2LUJ4JCS2BBEE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5MR7DA7OBU4RW2LUJ4JCS2BBEE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:5MR7DA7OBU4RW2LUJ4JCS2BBEE","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":"90738fc4ec7babd036ef1baffa5f53eb7b511beefb8ca8d3413c24a295b405ef","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2026-05-27T20:13:27Z","title_canon_sha256":"5c0b3041b8c0250e8b9c82b20526e5b58afd7de029d59b81e609a8a9436545f3"},"schema_version":"1.0","source":{"id":"2606.02619","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.02619","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"arxiv_version","alias_value":"2606.02619v1","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.02619","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"pith_short_12","alias_value":"5MR7DA7OBU4R","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"pith_short_16","alias_value":"5MR7DA7OBU4RW2LU","created_at":"2026-06-03T00:05:04Z"},{"alias_kind":"pith_short_8","alias_value":"5MR7DA7O","created_at":"2026-06-03T00:05:04Z"}],"graph_snapshots":[{"event_id":"sha256:6c517f8e71ce8c3683668ba88b4adf124de39fb8d264f2a112eb7de82f5496ea","target":"graph","created_at":"2026-06-03T00:05:04Z","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/2606.02619/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"It has recently been shown that x-ray parametric down-conversion (XPDC) provides access to high-energy polaritons, resulting from the hybridization of down-converted photons with electronic excitations in a nonlinear medium. Here, we present a spectrally resolved study of this effect around the K-shell absorption edge in diamond. Our results exhibit pronounced signatures of polaritonic hybridization, which we visualize by introducing a polariton spectral map and analyze by help of theoretical modelling. We find that the hybridization at this absorption edge results in substantially higher coup","authors_text":"Ankita Negi, Blanka Detlefs, Christina Boemer, Christoph J. Sahle, Dietrich Krebs, Fridtjof Kerker, Xenia Brockm\\\"uller","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2026-05-27T20:13:27Z","title":"Polariton spectroscopy at the diamond K-edge via X-ray parametric down-conversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.02619","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":"sha256:3bc69bbaa6cc82e5360ac484fec08703c8244060cbdca000d32973192004df42","target":"record","created_at":"2026-06-03T00:05:04Z","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":"90738fc4ec7babd036ef1baffa5f53eb7b511beefb8ca8d3413c24a295b405ef","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2026-05-27T20:13:27Z","title_canon_sha256":"5c0b3041b8c0250e8b9c82b20526e5b58afd7de029d59b81e609a8a9436545f3"},"schema_version":"1.0","source":{"id":"2606.02619","kind":"arxiv","version":1}},"canonical_sha256":"eb23f183ee0d391b69744f12296821211cc8990010decd37c6eec1c132679adb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eb23f183ee0d391b69744f12296821211cc8990010decd37c6eec1c132679adb","first_computed_at":"2026-06-03T00:05:04.877966Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-03T00:05:04.877966Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F5etdTL44BtSIlwlxx9LBZ8pw8uqjLPDHmG6F+0hh/+7EJaW4riUzLZ5QwnMPGF6AVXbIVZJtK6CGHjxTPNgAw==","signature_status":"signed_v1","signed_at":"2026-06-03T00:05:04.878423Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.02619","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3bc69bbaa6cc82e5360ac484fec08703c8244060cbdca000d32973192004df42","sha256:6c517f8e71ce8c3683668ba88b4adf124de39fb8d264f2a112eb7de82f5496ea"],"state_sha256":"f8acb523a9887ac3f2c4dbc4429c09b66295aeb2efb68cc885598b8c66c18d3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/sZLp3m3lAsbcvLb7YLuEf5MPVhJYL5sucYr5MAZphCDiLeQUsUEveQfxyk9z4A03EuY9lrebcmF29jtUYcGDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T10:11:25.013725Z","bundle_sha256":"a3a6a8f5f58c833f1cddec5fdb4cc72074d2f6ac8c19b6144032d610b323d4b7"}}