{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:7Z34UKGHI3V4GHHUNCVP7NNRQ5","short_pith_number":"pith:7Z34UKGH","canonical_record":{"source":{"id":"2102.02573","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-04T12:25:27Z","cross_cats_sorted":[],"title_canon_sha256":"640a1c3ac36eff5f7fae5586faef31b0ce5a2ecfb421482ad50f0fbf03b1f364","abstract_canon_sha256":"3764b598e17874385f19ceeec43d72ef98aaa5428f89efe68138d9f254351b07"},"schema_version":"1.0"},"canonical_sha256":"fe77ca28c746ebc31cf468aaffb5b1877a34bf9f43a8834adf19702977ed6571","source":{"kind":"arxiv","id":"2102.02573","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.02573","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"arxiv_version","alias_value":"2102.02573v3","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.02573","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"pith_short_12","alias_value":"7Z34UKGHI3V4","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"pith_short_16","alias_value":"7Z34UKGHI3V4GHHU","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"pith_short_8","alias_value":"7Z34UKGH","created_at":"2026-07-05T02:59:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:7Z34UKGHI3V4GHHUNCVP7NNRQ5","target":"record","payload":{"canonical_record":{"source":{"id":"2102.02573","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-04T12:25:27Z","cross_cats_sorted":[],"title_canon_sha256":"640a1c3ac36eff5f7fae5586faef31b0ce5a2ecfb421482ad50f0fbf03b1f364","abstract_canon_sha256":"3764b598e17874385f19ceeec43d72ef98aaa5428f89efe68138d9f254351b07"},"schema_version":"1.0"},"canonical_sha256":"fe77ca28c746ebc31cf468aaffb5b1877a34bf9f43a8834adf19702977ed6571","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:59:36.391719Z","signature_b64":"bRtXBdkDyZegjkK9hai0kLY+SKD68hOJeGbjTmeHAhrvb0f6sNdBmj/JlCvkAoOWRNJuH7l3YjyBZ+xLu3bHAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe77ca28c746ebc31cf468aaffb5b1877a34bf9f43a8834adf19702977ed6571","last_reissued_at":"2026-07-05T02:59:36.391155Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:59:36.391155Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.02573","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:59:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gc/rw7cRQa6z5xkldqZ4CDSWhagiul54guu3CtO1h/F0yCSaTCjt1QMZkaqgbbbivajqBSQoqNOP4sSzsKMBCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T20:50:34.532962Z"},"content_sha256":"0b803a331b9ff7c9d7726ecdcdfe185169b9a78680a6bc085e6804c61b850441","schema_version":"1.0","event_id":"sha256:0b803a331b9ff7c9d7726ecdcdfe185169b9a78680a6bc085e6804c61b850441"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:7Z34UKGHI3V4GHHUNCVP7NNRQ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum walks on a programmable two-dimensional 62-qubit superconducting processor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Chao-Yang Lu, Cheng Guo, Cheng-Zhi Peng, Chen Zha, Chong Ying, Dachao Wu, Daojin Fan, Fusheng Chen, Futian Liang, Haoran Qian, Hao Rong, He-Liang Huang, Hong Su, Hui Deng, Jiale Yu, Jian-Wei Pan, Jin Lin, Kae Nemoto, Kaili Zhang, Lihua Sun, Ming-Cheng Chen, Ming Gong, Na Li, Qingling Zhu, Shaojun Guo, Shaowei Li, Shiyu Wang, Sirui Cao, V. M. Bastidas, W. J. Munro, Xiaobo Zhu, Yangsen Ye, Yong-Heng Huo, Youwei Zhao, Yulin Wu, Yu Xu","submitted_at":"2021-02-04T12:25:27Z","abstract_excerpt":"Quantum walks are the quantum mechanical analogue of classical random walks and an extremely powerful tool in quantum simulations, quantum search algorithms, and even for universal quantum computing. In our work, we have designed and fabricated an 8x8 two-dimensional square superconducting qubit array composed of 62 functional qubits. We used this device to demonstrate high fidelity single and two particle quantum walks. Furthermore, with the high programmability of the quantum processor, we implemented a Mach-Zehnder interferometer where the quantum walker coherently traverses in two paths be"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.02573","kind":"arxiv","version":3},"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/2102.02573/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":"2026-07-05T02:59:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uDBISv8pOyk0U2dooUiwSBE+nNrmEqHxEYcxsSuHWVdaW0qBuTfQ2cOAwGEu7p7OVHUdEi9mZywtica3KktbBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T20:50:34.533486Z"},"content_sha256":"a76d882007229f54439f2ea9bea290454ab3aaca4fbfbd569466846f6592604d","schema_version":"1.0","event_id":"sha256:a76d882007229f54439f2ea9bea290454ab3aaca4fbfbd569466846f6592604d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7Z34UKGHI3V4GHHUNCVP7NNRQ5/bundle.json","state_url":"https://pith.science/pith/7Z34UKGHI3V4GHHUNCVP7NNRQ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7Z34UKGHI3V4GHHUNCVP7NNRQ5/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":"2026-08-21T20:50:34Z","links":{"resolver":"https://pith.science/pith/7Z34UKGHI3V4GHHUNCVP7NNRQ5","bundle":"https://pith.science/pith/7Z34UKGHI3V4GHHUNCVP7NNRQ5/bundle.json","state":"https://pith.science/pith/7Z34UKGHI3V4GHHUNCVP7NNRQ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7Z34UKGHI3V4GHHUNCVP7NNRQ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:7Z34UKGHI3V4GHHUNCVP7NNRQ5","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":"3764b598e17874385f19ceeec43d72ef98aaa5428f89efe68138d9f254351b07","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-04T12:25:27Z","title_canon_sha256":"640a1c3ac36eff5f7fae5586faef31b0ce5a2ecfb421482ad50f0fbf03b1f364"},"schema_version":"1.0","source":{"id":"2102.02573","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.02573","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"arxiv_version","alias_value":"2102.02573v3","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.02573","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"pith_short_12","alias_value":"7Z34UKGHI3V4","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"pith_short_16","alias_value":"7Z34UKGHI3V4GHHU","created_at":"2026-07-05T02:59:36Z"},{"alias_kind":"pith_short_8","alias_value":"7Z34UKGH","created_at":"2026-07-05T02:59:36Z"}],"graph_snapshots":[{"event_id":"sha256:a76d882007229f54439f2ea9bea290454ab3aaca4fbfbd569466846f6592604d","target":"graph","created_at":"2026-07-05T02:59:36Z","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/2102.02573/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum walks are the quantum mechanical analogue of classical random walks and an extremely powerful tool in quantum simulations, quantum search algorithms, and even for universal quantum computing. In our work, we have designed and fabricated an 8x8 two-dimensional square superconducting qubit array composed of 62 functional qubits. We used this device to demonstrate high fidelity single and two particle quantum walks. Furthermore, with the high programmability of the quantum processor, we implemented a Mach-Zehnder interferometer where the quantum walker coherently traverses in two paths be","authors_text":"Chao-Yang Lu, Cheng Guo, Cheng-Zhi Peng, Chen Zha, Chong Ying, Dachao Wu, Daojin Fan, Fusheng Chen, Futian Liang, Haoran Qian, Hao Rong, He-Liang Huang, Hong Su, Hui Deng, Jiale Yu, Jian-Wei Pan, Jin Lin, Kae Nemoto, Kaili Zhang, Lihua Sun, Ming-Cheng Chen, Ming Gong, Na Li, Qingling Zhu, Shaojun Guo, Shaowei Li, Shiyu Wang, Sirui Cao, V. M. Bastidas, W. J. Munro, Xiaobo Zhu, Yangsen Ye, Yong-Heng Huo, Youwei Zhao, Yulin Wu, Yu Xu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-04T12:25:27Z","title":"Quantum walks on a programmable two-dimensional 62-qubit superconducting processor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.02573","kind":"arxiv","version":3},"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":"sha256:0b803a331b9ff7c9d7726ecdcdfe185169b9a78680a6bc085e6804c61b850441","target":"record","created_at":"2026-07-05T02:59:36Z","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":"3764b598e17874385f19ceeec43d72ef98aaa5428f89efe68138d9f254351b07","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-04T12:25:27Z","title_canon_sha256":"640a1c3ac36eff5f7fae5586faef31b0ce5a2ecfb421482ad50f0fbf03b1f364"},"schema_version":"1.0","source":{"id":"2102.02573","kind":"arxiv","version":3}},"canonical_sha256":"fe77ca28c746ebc31cf468aaffb5b1877a34bf9f43a8834adf19702977ed6571","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe77ca28c746ebc31cf468aaffb5b1877a34bf9f43a8834adf19702977ed6571","first_computed_at":"2026-07-05T02:59:36.391155Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:59:36.391155Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bRtXBdkDyZegjkK9hai0kLY+SKD68hOJeGbjTmeHAhrvb0f6sNdBmj/JlCvkAoOWRNJuH7l3YjyBZ+xLu3bHAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:59:36.391719Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.02573","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0b803a331b9ff7c9d7726ecdcdfe185169b9a78680a6bc085e6804c61b850441","sha256:a76d882007229f54439f2ea9bea290454ab3aaca4fbfbd569466846f6592604d"],"state_sha256":"36b166d405a5b319cddcb39ec2cc3134260c32fbd051a7e0afceb4a020d27d96"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vw7OKjQ0bO0HnlwlXLFfmOzbVM7sI4HV0museqU+YqlFh/WytpWTFkvig0FUQ1tVe7XrCdf0sEPXoecxYX3uAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T20:50:34.538289Z","bundle_sha256":"c812ca59052953ba623179f6e072ff73c365f35d450fc6c629cc4b138aab95cb"}}