{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:SXETB7R6K2ZPG26UGQSLHY44GK","short_pith_number":"pith:SXETB7R6","canonical_record":{"source":{"id":"2007.14383","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-28T17:49:26Z","cross_cats_sorted":[],"title_canon_sha256":"adccf66acb819bc86cceda6631674f881747b583f52cd92fadf9628bf7d322c2","abstract_canon_sha256":"0cd15951c2218c27043ac62e7ee7650c7d00b6ec66293b91115bb575fa43183d"},"schema_version":"1.0"},"canonical_sha256":"95c930fe3e56b2f36bd43424b3e39c329fb3a9579de36ab40b9bbe7b7925bea6","source":{"kind":"arxiv","id":"2007.14383","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.14383","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"arxiv_version","alias_value":"2007.14383v1","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.14383","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"pith_short_12","alias_value":"SXETB7R6K2ZP","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"pith_short_16","alias_value":"SXETB7R6K2ZPG26U","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"pith_short_8","alias_value":"SXETB7R6","created_at":"2026-07-05T03:09:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:SXETB7R6K2ZPG26UGQSLHY44GK","target":"record","payload":{"canonical_record":{"source":{"id":"2007.14383","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-28T17:49:26Z","cross_cats_sorted":[],"title_canon_sha256":"adccf66acb819bc86cceda6631674f881747b583f52cd92fadf9628bf7d322c2","abstract_canon_sha256":"0cd15951c2218c27043ac62e7ee7650c7d00b6ec66293b91115bb575fa43183d"},"schema_version":"1.0"},"canonical_sha256":"95c930fe3e56b2f36bd43424b3e39c329fb3a9579de36ab40b9bbe7b7925bea6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:09:56.513270Z","signature_b64":"AuHVbW0m6QlnXZtZ5HYUthpBEX/llx/8Wq7gy//hOofXLQ2VvMYls5SVcsV1oaD+v0XBZT2XHKeJypqT9G+pDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"95c930fe3e56b2f36bd43424b3e39c329fb3a9579de36ab40b9bbe7b7925bea6","last_reissued_at":"2026-07-05T03:09:56.512781Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:09:56.512781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.14383","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":"2026-07-05T03:09:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OCL2JGGhhGaMTykv80FRnTyXDkO4R6n7ao2oW9sqHUySTJmwklxUuBAnJ9TE1ekk6qVGbA7yS3gOxjFGLWQcAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T18:33:18.435405Z"},"content_sha256":"01be106768a606b7f76a684f5e25d199920179fd1c22f99d1756402c08908c10","schema_version":"1.0","event_id":"sha256:01be106768a606b7f76a684f5e25d199920179fd1c22f99d1756402c08908c10"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:SXETB7R6K2ZPG26UGQSLHY44GK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Shadow-wall lithography of ballistic superconductor-semiconductor quantum devices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Alexandra Fursina, Erik P. A. M. Bakkers, Francesco Borsoi, Ghada Badawy, Grzegorz P. Mazur, Jie Shen, Kevin van Hoogdalem, Kongyi Li, Leo P. Kouwenhoven, Marina Quintero-P\\'erez, Mark Ammerlaan, May An Y. van de Poll, Micha{\\l} P. Nowak, Nick van Loo, Sasa Gazibegovic, Sebastian Heedt, Svetlana Korneychuk","submitted_at":"2020-07-28T17:49:26Z","abstract_excerpt":"The realization of a topological qubit calls for advanced techniques to readily and reproducibly engineer induced superconductivity in semiconductor nanowires. Here, we introduce an on-chip fabrication paradigm based on shadow walls that offers substantial advances in device quality and reproducibility. It allows for the implementation of novel quantum devices and ultimately topological qubits while eliminating many fabrication steps such as lithography and etching. This is critical to preserve the integrity and homogeneity of the fragile hybrid interfaces. The approach simplifies the reproduc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.14383","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/2007.14383/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":"2026-07-05T03:09:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lnefWByQbp/tTBqryjXuZV+ySFUuwY87lYYmLiJvOEzQSvNxLglt8wz7pjg2qiXPE7nJk47t1ywOu0XcJGpjDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T18:33:18.435865Z"},"content_sha256":"eba3c6a9a33c29edb7a37a955b7e259dabd845c284f03479c21c4c9aa012ad19","schema_version":"1.0","event_id":"sha256:eba3c6a9a33c29edb7a37a955b7e259dabd845c284f03479c21c4c9aa012ad19"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SXETB7R6K2ZPG26UGQSLHY44GK/bundle.json","state_url":"https://pith.science/pith/SXETB7R6K2ZPG26UGQSLHY44GK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SXETB7R6K2ZPG26UGQSLHY44GK/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":"2026-08-06T18:33:18Z","links":{"resolver":"https://pith.science/pith/SXETB7R6K2ZPG26UGQSLHY44GK","bundle":"https://pith.science/pith/SXETB7R6K2ZPG26UGQSLHY44GK/bundle.json","state":"https://pith.science/pith/SXETB7R6K2ZPG26UGQSLHY44GK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SXETB7R6K2ZPG26UGQSLHY44GK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:SXETB7R6K2ZPG26UGQSLHY44GK","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":"0cd15951c2218c27043ac62e7ee7650c7d00b6ec66293b91115bb575fa43183d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-28T17:49:26Z","title_canon_sha256":"adccf66acb819bc86cceda6631674f881747b583f52cd92fadf9628bf7d322c2"},"schema_version":"1.0","source":{"id":"2007.14383","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.14383","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"arxiv_version","alias_value":"2007.14383v1","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.14383","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"pith_short_12","alias_value":"SXETB7R6K2ZP","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"pith_short_16","alias_value":"SXETB7R6K2ZPG26U","created_at":"2026-07-05T03:09:56Z"},{"alias_kind":"pith_short_8","alias_value":"SXETB7R6","created_at":"2026-07-05T03:09:56Z"}],"graph_snapshots":[{"event_id":"sha256:eba3c6a9a33c29edb7a37a955b7e259dabd845c284f03479c21c4c9aa012ad19","target":"graph","created_at":"2026-07-05T03:09:56Z","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/2007.14383/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The realization of a topological qubit calls for advanced techniques to readily and reproducibly engineer induced superconductivity in semiconductor nanowires. Here, we introduce an on-chip fabrication paradigm based on shadow walls that offers substantial advances in device quality and reproducibility. It allows for the implementation of novel quantum devices and ultimately topological qubits while eliminating many fabrication steps such as lithography and etching. This is critical to preserve the integrity and homogeneity of the fragile hybrid interfaces. The approach simplifies the reproduc","authors_text":"Alexandra Fursina, Erik P. A. M. Bakkers, Francesco Borsoi, Ghada Badawy, Grzegorz P. Mazur, Jie Shen, Kevin van Hoogdalem, Kongyi Li, Leo P. Kouwenhoven, Marina Quintero-P\\'erez, Mark Ammerlaan, May An Y. van de Poll, Micha{\\l} P. Nowak, Nick van Loo, Sasa Gazibegovic, Sebastian Heedt, Svetlana Korneychuk","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-28T17:49:26Z","title":"Shadow-wall lithography of ballistic superconductor-semiconductor quantum devices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.14383","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":"sha256:01be106768a606b7f76a684f5e25d199920179fd1c22f99d1756402c08908c10","target":"record","created_at":"2026-07-05T03:09:56Z","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":"0cd15951c2218c27043ac62e7ee7650c7d00b6ec66293b91115bb575fa43183d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2020-07-28T17:49:26Z","title_canon_sha256":"adccf66acb819bc86cceda6631674f881747b583f52cd92fadf9628bf7d322c2"},"schema_version":"1.0","source":{"id":"2007.14383","kind":"arxiv","version":1}},"canonical_sha256":"95c930fe3e56b2f36bd43424b3e39c329fb3a9579de36ab40b9bbe7b7925bea6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95c930fe3e56b2f36bd43424b3e39c329fb3a9579de36ab40b9bbe7b7925bea6","first_computed_at":"2026-07-05T03:09:56.512781Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:09:56.512781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AuHVbW0m6QlnXZtZ5HYUthpBEX/llx/8Wq7gy//hOofXLQ2VvMYls5SVcsV1oaD+v0XBZT2XHKeJypqT9G+pDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:09:56.513270Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.14383","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01be106768a606b7f76a684f5e25d199920179fd1c22f99d1756402c08908c10","sha256:eba3c6a9a33c29edb7a37a955b7e259dabd845c284f03479c21c4c9aa012ad19"],"state_sha256":"d61fa3ac107dc8ecaca20c391187249455011eee2c851a59dddff69c18620fd3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5RIrq6K4JSk9GeFh9kQsIizIHLsdzgsUnmdR3Yf4bOwhEDfurKJMEs5I9xL1f+D7IW8cOy9L2JVBsjvDRGXRCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T18:33:18.438640Z","bundle_sha256":"3ff4f64f177cab0e8da2e074f0f32d19c56260a1e0d28bf98f8eaeca62526d4f"}}