{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:SJWVH3UEV7ENQJDGEMPYN5P2DT","short_pith_number":"pith:SJWVH3UE","canonical_record":{"source":{"id":"2007.14818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-29T13:12:50Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"7abf67de3ae6428b92ea30b67369474676daa7ad5615d6a2a3a37410bca5ce8c","abstract_canon_sha256":"f2291854cc0e43bcff6358bad570178c3a82e3842e0b31e761d6ac2cff3b3eb7"},"schema_version":"1.0"},"canonical_sha256":"926d53ee84afc8d82466231f86f5fa1cf72754800252a33abe7becb5ad48b3d3","source":{"kind":"arxiv","id":"2007.14818","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.14818","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"arxiv_version","alias_value":"2007.14818v1","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.14818","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"pith_short_12","alias_value":"SJWVH3UEV7EN","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"pith_short_16","alias_value":"SJWVH3UEV7ENQJDG","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"pith_short_8","alias_value":"SJWVH3UE","created_at":"2026-07-05T01:23:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:SJWVH3UEV7ENQJDGEMPYN5P2DT","target":"record","payload":{"canonical_record":{"source":{"id":"2007.14818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-29T13:12:50Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"7abf67de3ae6428b92ea30b67369474676daa7ad5615d6a2a3a37410bca5ce8c","abstract_canon_sha256":"f2291854cc0e43bcff6358bad570178c3a82e3842e0b31e761d6ac2cff3b3eb7"},"schema_version":"1.0"},"canonical_sha256":"926d53ee84afc8d82466231f86f5fa1cf72754800252a33abe7becb5ad48b3d3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:23:19.278093Z","signature_b64":"5VigcyfQ16udIwqyWPBSIxu5PlHY0zC/GE/icxAkF/MK0U7Mg0bp5dYqTydjeJQQNp1ENGj4lwIgvZq2vfeuAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"926d53ee84afc8d82466231f86f5fa1cf72754800252a33abe7becb5ad48b3d3","last_reissued_at":"2026-07-05T01:23:19.277660Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:23:19.277660Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.14818","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":"2026-07-05T01:23:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JHq5McgIGPr1Iu4WVA8qUqwKS331m2iakl8PKxK0jt0ea7Cb/6zawEV7NjrfJvwmjyqsh2m1lLMqlAPCG6O3DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T07:12:59.975884Z"},"content_sha256":"2f8f0a63efc33f9deefd9aacde002f5cd2e5f218f553e261752425c94ede376b","schema_version":"1.0","event_id":"sha256:2f8f0a63efc33f9deefd9aacde002f5cd2e5f218f553e261752425c94ede376b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:SJWVH3UEV7ENQJDGEMPYN5P2DT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Demonstration of a polariton step potential by local variation of light-matter coupling in a van-der-Waals heterostructure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"C. Rupprecht, C. Schneider, F. Eilenberger, H. Knopf, K. Watanabe, M.Klaas, S. H\\\"ofling, S. Schr\\\"oder, S. Tongay, T. Taniguchi, Y. Qin","submitted_at":"2020-07-29T13:12:50Z","abstract_excerpt":"The large oscillator strength of excitons in transition metal dichalcogenide layers facilitates the formation of exciton-polariton resonances for monolayers and van-der-Waals heterostructures embedded in optical microcavities. Here, we show, that locally changing the number of layers in a WSe2/hBN/WSe2 van-der-Waals heterostructure embedded in a monolithic, high-quality-factor cavity gives rise to a local variation of the coupling strength. This effect yields a polaritonic stair case potential, which we demonstrate at room temperature. Our result paves the way towards engineering local polarit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.14818","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/2007.14818/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":"2026-07-05T01:23:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y/5yDt4bRFB08R4CuZGsDG4pJzvYPliaPbVKnwCi3Zdf6MhAEwhIr+WAej2U37mNaeahII96twI0neFP3es6DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T07:12:59.976369Z"},"content_sha256":"0c52226b9d2ddabbb0623002a4fc0387eea8f9af7d7286faeb82d929e6da50e2","schema_version":"1.0","event_id":"sha256:0c52226b9d2ddabbb0623002a4fc0387eea8f9af7d7286faeb82d929e6da50e2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SJWVH3UEV7ENQJDGEMPYN5P2DT/bundle.json","state_url":"https://pith.science/pith/SJWVH3UEV7ENQJDGEMPYN5P2DT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SJWVH3UEV7ENQJDGEMPYN5P2DT/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":"2026-08-05T07:12:59Z","links":{"resolver":"https://pith.science/pith/SJWVH3UEV7ENQJDGEMPYN5P2DT","bundle":"https://pith.science/pith/SJWVH3UEV7ENQJDGEMPYN5P2DT/bundle.json","state":"https://pith.science/pith/SJWVH3UEV7ENQJDGEMPYN5P2DT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SJWVH3UEV7ENQJDGEMPYN5P2DT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:SJWVH3UEV7ENQJDGEMPYN5P2DT","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":"f2291854cc0e43bcff6358bad570178c3a82e3842e0b31e761d6ac2cff3b3eb7","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-29T13:12:50Z","title_canon_sha256":"7abf67de3ae6428b92ea30b67369474676daa7ad5615d6a2a3a37410bca5ce8c"},"schema_version":"1.0","source":{"id":"2007.14818","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.14818","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"arxiv_version","alias_value":"2007.14818v1","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.14818","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"pith_short_12","alias_value":"SJWVH3UEV7EN","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"pith_short_16","alias_value":"SJWVH3UEV7ENQJDG","created_at":"2026-07-05T01:23:19Z"},{"alias_kind":"pith_short_8","alias_value":"SJWVH3UE","created_at":"2026-07-05T01:23:19Z"}],"graph_snapshots":[{"event_id":"sha256:0c52226b9d2ddabbb0623002a4fc0387eea8f9af7d7286faeb82d929e6da50e2","target":"graph","created_at":"2026-07-05T01:23:19Z","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/2007.14818/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The large oscillator strength of excitons in transition metal dichalcogenide layers facilitates the formation of exciton-polariton resonances for monolayers and van-der-Waals heterostructures embedded in optical microcavities. Here, we show, that locally changing the number of layers in a WSe2/hBN/WSe2 van-der-Waals heterostructure embedded in a monolithic, high-quality-factor cavity gives rise to a local variation of the coupling strength. This effect yields a polaritonic stair case potential, which we demonstrate at room temperature. Our result paves the way towards engineering local polarit","authors_text":"C. Rupprecht, C. Schneider, F. Eilenberger, H. Knopf, K. Watanabe, M.Klaas, S. H\\\"ofling, S. Schr\\\"oder, S. Tongay, T. Taniguchi, Y. Qin","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-29T13:12:50Z","title":"Demonstration of a polariton step potential by local variation of light-matter coupling in a van-der-Waals heterostructure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.14818","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":"sha256:2f8f0a63efc33f9deefd9aacde002f5cd2e5f218f553e261752425c94ede376b","target":"record","created_at":"2026-07-05T01:23:19Z","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":"f2291854cc0e43bcff6358bad570178c3a82e3842e0b31e761d6ac2cff3b3eb7","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-29T13:12:50Z","title_canon_sha256":"7abf67de3ae6428b92ea30b67369474676daa7ad5615d6a2a3a37410bca5ce8c"},"schema_version":"1.0","source":{"id":"2007.14818","kind":"arxiv","version":1}},"canonical_sha256":"926d53ee84afc8d82466231f86f5fa1cf72754800252a33abe7becb5ad48b3d3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"926d53ee84afc8d82466231f86f5fa1cf72754800252a33abe7becb5ad48b3d3","first_computed_at":"2026-07-05T01:23:19.277660Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:23:19.277660Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5VigcyfQ16udIwqyWPBSIxu5PlHY0zC/GE/icxAkF/MK0U7Mg0bp5dYqTydjeJQQNp1ENGj4lwIgvZq2vfeuAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:23:19.278093Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.14818","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f8f0a63efc33f9deefd9aacde002f5cd2e5f218f553e261752425c94ede376b","sha256:0c52226b9d2ddabbb0623002a4fc0387eea8f9af7d7286faeb82d929e6da50e2"],"state_sha256":"8bd0aa4a5e3561cb6723dee610f7a02a80605003be8fc545161019704402ec31"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iqQ7A5JrepKvhhJxsx12OE8ATLsJ3IUY3hmke1MaiBwPNMLX7nDcdCDPLQxQUDnXKTo56iDk4WnD/VoYPp+QAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T07:12:59.981229Z","bundle_sha256":"75959f05c68c89ca65a2850de5ad18b32303c9f63bd141646dcc010212671359"}}