{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:747EJ6PP2AQN6QP7BOFLF5TJI6","short_pith_number":"pith:747EJ6PP","canonical_record":{"source":{"id":"1210.7113","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-26T12:20:15Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"063bff7d7d0cee1faa2ab02a7dad189de6f1db03a29580fb4fb42198499e9993","abstract_canon_sha256":"4fbf4e927d983bb83a9f027113b89eaf6cfac707ab99c377443a083e929b2c23"},"schema_version":"1.0"},"canonical_sha256":"ff3e44f9efd020df41ff0b8ab2f669479bd21894c0a21c0acdd8a607c8004868","source":{"kind":"arxiv","id":"1210.7113","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.7113","created_at":"2026-05-18T03:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"1210.7113v1","created_at":"2026-05-18T03:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.7113","created_at":"2026-05-18T03:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"747EJ6PP2AQN","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"747EJ6PP2AQN6QP7","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"747EJ6PP","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:747EJ6PP2AQN6QP7BOFLF5TJI6","target":"record","payload":{"canonical_record":{"source":{"id":"1210.7113","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-26T12:20:15Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"063bff7d7d0cee1faa2ab02a7dad189de6f1db03a29580fb4fb42198499e9993","abstract_canon_sha256":"4fbf4e927d983bb83a9f027113b89eaf6cfac707ab99c377443a083e929b2c23"},"schema_version":"1.0"},"canonical_sha256":"ff3e44f9efd020df41ff0b8ab2f669479bd21894c0a21c0acdd8a607c8004868","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:22:05.969082Z","signature_b64":"3VHr5vd051inYNSds49X/xKwVhg6FvWhPb7NpLKza2q1I+oa4h4+yb2pKTJq+EiqnohiXbxxGePiBoFK403KDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff3e44f9efd020df41ff0b8ab2f669479bd21894c0a21c0acdd8a607c8004868","last_reissued_at":"2026-05-18T03:22:05.968447Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:22:05.968447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.7113","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":"2026-05-18T03:22:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KzmVjPf4X+Gm+hiy1EdVpFE/WQjg8uISvxp34xEUZzbKaWC1D811GGuCCP94aP2XBqa9FSH26dKSHaxyEdZaAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T06:12:54.706654Z"},"content_sha256":"888238b51ae4119e2620bba1a9b04f4996080c094019f96b75daf09e36ad26a4","schema_version":"1.0","event_id":"sha256:888238b51ae4119e2620bba1a9b04f4996080c094019f96b75daf09e36ad26a4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:747EJ6PP2AQN6QP7BOFLF5TJI6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct band structure measurement of a buried two-dimensional electron gas","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Jill A. Miwa, Justin W. Wells, Michelle Y. Simmons, Philip Hofmann","submitted_at":"2012-10-26T12:20:15Z","abstract_excerpt":"Buried two dimensional electron gasses (2DEGs) have recently attracted considerable attention as a testing ground for both fundamental physics and quantum computation applications. Such 2DEGs can be created by phosphorus delta (\\delta) doping of silicon, a technique in which a dense and narrow dopant profile is buried beneath the Si surface. Phosphorous \\delta-doping is a particularly attractive platform for fabricating scalable spin quantum bit architectures, compatible with current semiconductor technology. The band structure of the \\delta-layers that underpin these devices has been studied "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.7113","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":"2026-05-18T03:22:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4LBuiJ05Hs6xQBi7nVIUxy7jR/aRK0cxcRZ8NDAxaemP0mCl/Yq/KARhgddsnYcvqcL6J4z8MaXHtGw0drjPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T06:12:54.707404Z"},"content_sha256":"01b0f3e7fc6585f631499afb0abc237b89412e06ab05661f9b5a775edc9d7829","schema_version":"1.0","event_id":"sha256:01b0f3e7fc6585f631499afb0abc237b89412e06ab05661f9b5a775edc9d7829"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/747EJ6PP2AQN6QP7BOFLF5TJI6/bundle.json","state_url":"https://pith.science/pith/747EJ6PP2AQN6QP7BOFLF5TJI6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/747EJ6PP2AQN6QP7BOFLF5TJI6/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":"2026-06-05T06:12:54Z","links":{"resolver":"https://pith.science/pith/747EJ6PP2AQN6QP7BOFLF5TJI6","bundle":"https://pith.science/pith/747EJ6PP2AQN6QP7BOFLF5TJI6/bundle.json","state":"https://pith.science/pith/747EJ6PP2AQN6QP7BOFLF5TJI6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/747EJ6PP2AQN6QP7BOFLF5TJI6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:747EJ6PP2AQN6QP7BOFLF5TJI6","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":"4fbf4e927d983bb83a9f027113b89eaf6cfac707ab99c377443a083e929b2c23","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-26T12:20:15Z","title_canon_sha256":"063bff7d7d0cee1faa2ab02a7dad189de6f1db03a29580fb4fb42198499e9993"},"schema_version":"1.0","source":{"id":"1210.7113","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.7113","created_at":"2026-05-18T03:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"1210.7113v1","created_at":"2026-05-18T03:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.7113","created_at":"2026-05-18T03:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"747EJ6PP2AQN","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"747EJ6PP2AQN6QP7","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"747EJ6PP","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:01b0f3e7fc6585f631499afb0abc237b89412e06ab05661f9b5a775edc9d7829","target":"graph","created_at":"2026-05-18T03:22:05Z","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":"Buried two dimensional electron gasses (2DEGs) have recently attracted considerable attention as a testing ground for both fundamental physics and quantum computation applications. Such 2DEGs can be created by phosphorus delta (\\delta) doping of silicon, a technique in which a dense and narrow dopant profile is buried beneath the Si surface. Phosphorous \\delta-doping is a particularly attractive platform for fabricating scalable spin quantum bit architectures, compatible with current semiconductor technology. The band structure of the \\delta-layers that underpin these devices has been studied ","authors_text":"Jill A. Miwa, Justin W. Wells, Michelle Y. Simmons, Philip Hofmann","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-26T12:20:15Z","title":"Direct band structure measurement of a buried two-dimensional electron gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.7113","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":"sha256:888238b51ae4119e2620bba1a9b04f4996080c094019f96b75daf09e36ad26a4","target":"record","created_at":"2026-05-18T03:22:05Z","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":"4fbf4e927d983bb83a9f027113b89eaf6cfac707ab99c377443a083e929b2c23","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-26T12:20:15Z","title_canon_sha256":"063bff7d7d0cee1faa2ab02a7dad189de6f1db03a29580fb4fb42198499e9993"},"schema_version":"1.0","source":{"id":"1210.7113","kind":"arxiv","version":1}},"canonical_sha256":"ff3e44f9efd020df41ff0b8ab2f669479bd21894c0a21c0acdd8a607c8004868","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff3e44f9efd020df41ff0b8ab2f669479bd21894c0a21c0acdd8a607c8004868","first_computed_at":"2026-05-18T03:22:05.968447Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:22:05.968447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3VHr5vd051inYNSds49X/xKwVhg6FvWhPb7NpLKza2q1I+oa4h4+yb2pKTJq+EiqnohiXbxxGePiBoFK403KDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:22:05.969082Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.7113","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:888238b51ae4119e2620bba1a9b04f4996080c094019f96b75daf09e36ad26a4","sha256:01b0f3e7fc6585f631499afb0abc237b89412e06ab05661f9b5a775edc9d7829"],"state_sha256":"5b073d684fba9738707576eb4ada739c60a34c24898951455f87419d32b83082"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HwYk1dv2YH3E4Ctj1JQ4CRDng98oXwhN4NOjPJF6vmkycNOVmiRT6GEs7iXRSQjlDbuicOiApdlx2Gx0E7htCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T06:12:54.711162Z","bundle_sha256":"576e2b16fd0f190ec3283ab424ffd308dd15d951dc27ff21940667c57e7c0e85"}}