{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:45UIMV5CDL2LHTCNI7SKRSMK6V","short_pith_number":"pith:45UIMV5C","canonical_record":{"source":{"id":"1711.02355","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-11-07T09:37:48Z","cross_cats_sorted":[],"title_canon_sha256":"14c091b19d7312262332588d3b9e0584d09f9f04d03a8e619c44247a1aa4e24d","abstract_canon_sha256":"a2c7c276d307fefba74c7f0dd299102e281ce2355d6d5a7dd51b03c591cf900f"},"schema_version":"1.0"},"canonical_sha256":"e7688657a21af4b3cc4d47e4a8c98af5593cb01c1f1f96823bdc02ed12d7d112","source":{"kind":"arxiv","id":"1711.02355","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.02355","created_at":"2026-05-18T00:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"1711.02355v1","created_at":"2026-05-18T00:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.02355","created_at":"2026-05-18T00:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"45UIMV5CDL2L","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"45UIMV5CDL2LHTCN","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"45UIMV5C","created_at":"2026-05-18T12:30:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:45UIMV5CDL2LHTCNI7SKRSMK6V","target":"record","payload":{"canonical_record":{"source":{"id":"1711.02355","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-11-07T09:37:48Z","cross_cats_sorted":[],"title_canon_sha256":"14c091b19d7312262332588d3b9e0584d09f9f04d03a8e619c44247a1aa4e24d","abstract_canon_sha256":"a2c7c276d307fefba74c7f0dd299102e281ce2355d6d5a7dd51b03c591cf900f"},"schema_version":"1.0"},"canonical_sha256":"e7688657a21af4b3cc4d47e4a8c98af5593cb01c1f1f96823bdc02ed12d7d112","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:53.625873Z","signature_b64":"4KzodxAxiMnlgxaKThwt1yQxJQsQytpmshxBg616OIhhA1O/XjDpFhq1JifyOQqiJck06S+L8RPQZoRShot9BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e7688657a21af4b3cc4d47e4a8c98af5593cb01c1f1f96823bdc02ed12d7d112","last_reissued_at":"2026-05-18T00:26:53.625241Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:53.625241Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.02355","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":"2026-05-18T00:26:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B/GVtFEH9RweYuKPy6ff2mLTOATTTRbxU95PStIDs9QTXMy8IT2+xl9574sex6eTCM6+pOnpcs9Q12KZKazmCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:11:38.462399Z"},"content_sha256":"f0685312ec5be90c30b469ea304a11c789d36c4617a6ae221aebf02c518c1a20","schema_version":"1.0","event_id":"sha256:f0685312ec5be90c30b469ea304a11c789d36c4617a6ae221aebf02c518c1a20"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:45UIMV5CDL2LHTCNI7SKRSMK6V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical conductivity of a quantum electron gas in a Sierpinski carpet","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Andrea Tomadin, Edo van Veen, Marco Polini, Mikhail I. Katsnelson, Shengjun Yuan","submitted_at":"2017-11-07T09:37:48Z","abstract_excerpt":"Recent advances in nanofabrication methods have made it possible to create complex two-dimensional artificial structures, such as fractals, where electrons can be confined. The optoelectronic and plasmonic properties of these exotic quantum electron systems are largely unexplored. In this article, we calculate the optical conductivity of a two-dimensional electron gas in a Sierpinski carpet (SC). The SC is a paradigmatic fractal that can be fabricated in a planar solid-state matrix by means of an iterative procedure. We show that the optical conductivity as a function of frequency (i.e. the op"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.02355","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":""},"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":"2026-05-18T00:26:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fpge4/LMbkPtpzStacwZ94f7s2ekZ8C8+9o3QAgTWyhSdaOOzjtfDjQLJDFMORga3Xq48pJ85coBz1vJwXIWCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:11:38.462738Z"},"content_sha256":"f31fa008bcdf47570c6a7895372293077b3df6988c8b738512f72e4825e31048","schema_version":"1.0","event_id":"sha256:f31fa008bcdf47570c6a7895372293077b3df6988c8b738512f72e4825e31048"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/45UIMV5CDL2LHTCNI7SKRSMK6V/bundle.json","state_url":"https://pith.science/pith/45UIMV5CDL2LHTCNI7SKRSMK6V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/45UIMV5CDL2LHTCNI7SKRSMK6V/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":"2026-06-02T11:11:38Z","links":{"resolver":"https://pith.science/pith/45UIMV5CDL2LHTCNI7SKRSMK6V","bundle":"https://pith.science/pith/45UIMV5CDL2LHTCNI7SKRSMK6V/bundle.json","state":"https://pith.science/pith/45UIMV5CDL2LHTCNI7SKRSMK6V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/45UIMV5CDL2LHTCNI7SKRSMK6V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:45UIMV5CDL2LHTCNI7SKRSMK6V","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":"a2c7c276d307fefba74c7f0dd299102e281ce2355d6d5a7dd51b03c591cf900f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-11-07T09:37:48Z","title_canon_sha256":"14c091b19d7312262332588d3b9e0584d09f9f04d03a8e619c44247a1aa4e24d"},"schema_version":"1.0","source":{"id":"1711.02355","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.02355","created_at":"2026-05-18T00:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"1711.02355v1","created_at":"2026-05-18T00:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.02355","created_at":"2026-05-18T00:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"45UIMV5CDL2L","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"45UIMV5CDL2LHTCN","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"45UIMV5C","created_at":"2026-05-18T12:30:58Z"}],"graph_snapshots":[{"event_id":"sha256:f31fa008bcdf47570c6a7895372293077b3df6988c8b738512f72e4825e31048","target":"graph","created_at":"2026-05-18T00:26:53Z","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"},"paper":{"abstract_excerpt":"Recent advances in nanofabrication methods have made it possible to create complex two-dimensional artificial structures, such as fractals, where electrons can be confined. The optoelectronic and plasmonic properties of these exotic quantum electron systems are largely unexplored. In this article, we calculate the optical conductivity of a two-dimensional electron gas in a Sierpinski carpet (SC). The SC is a paradigmatic fractal that can be fabricated in a planar solid-state matrix by means of an iterative procedure. We show that the optical conductivity as a function of frequency (i.e. the op","authors_text":"Andrea Tomadin, Edo van Veen, Marco Polini, Mikhail I. Katsnelson, Shengjun Yuan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-11-07T09:37:48Z","title":"Optical conductivity of a quantum electron gas in a Sierpinski carpet"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.02355","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:f0685312ec5be90c30b469ea304a11c789d36c4617a6ae221aebf02c518c1a20","target":"record","created_at":"2026-05-18T00:26:53Z","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":"a2c7c276d307fefba74c7f0dd299102e281ce2355d6d5a7dd51b03c591cf900f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-11-07T09:37:48Z","title_canon_sha256":"14c091b19d7312262332588d3b9e0584d09f9f04d03a8e619c44247a1aa4e24d"},"schema_version":"1.0","source":{"id":"1711.02355","kind":"arxiv","version":1}},"canonical_sha256":"e7688657a21af4b3cc4d47e4a8c98af5593cb01c1f1f96823bdc02ed12d7d112","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e7688657a21af4b3cc4d47e4a8c98af5593cb01c1f1f96823bdc02ed12d7d112","first_computed_at":"2026-05-18T00:26:53.625241Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:53.625241Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4KzodxAxiMnlgxaKThwt1yQxJQsQytpmshxBg616OIhhA1O/XjDpFhq1JifyOQqiJck06S+L8RPQZoRShot9BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:53.625873Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.02355","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f0685312ec5be90c30b469ea304a11c789d36c4617a6ae221aebf02c518c1a20","sha256:f31fa008bcdf47570c6a7895372293077b3df6988c8b738512f72e4825e31048"],"state_sha256":"2b8ae37cbba1528e25a6a5d75a06f58679c72536844c1ccd415013f49213e350"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hb1Ik4qWUiIbddokm+fEakPva8zmsbwq+gR+fSjgOcZothwDG/3B/RR1EM8uGVZfBE4Z2K4e3d+LaKPnzEBsBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T11:11:38.464563Z","bundle_sha256":"1d231fb8e4acc526511c435fe7f187067db6cf972f98a13844685542f76cbf5a"}}