{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:6KIT47X56PNK7YHXTCVEWBRPGG","short_pith_number":"pith:6KIT47X5","canonical_record":{"source":{"id":"2011.07195","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-11-14T02:16:49Z","cross_cats_sorted":[],"title_canon_sha256":"6a7be21b27977f83eb793f2e47ebc0099e0c1e2132658dae2c5f62d85c86f50f","abstract_canon_sha256":"b367560792625e92a319ca869a41474f13d2210e35a101a08a37dd34159076f9"},"schema_version":"1.0"},"canonical_sha256":"f2913e7efdf3daafe0f798aa4b062f318c7f4cbc73afa5fec27a0da4376ce955","source":{"kind":"arxiv","id":"2011.07195","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.07195","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"arxiv_version","alias_value":"2011.07195v1","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.07195","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"pith_short_12","alias_value":"6KIT47X56PNK","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"pith_short_16","alias_value":"6KIT47X56PNK7YHX","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"pith_short_8","alias_value":"6KIT47X5","created_at":"2026-07-05T01:51:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:6KIT47X56PNK7YHXTCVEWBRPGG","target":"record","payload":{"canonical_record":{"source":{"id":"2011.07195","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-11-14T02:16:49Z","cross_cats_sorted":[],"title_canon_sha256":"6a7be21b27977f83eb793f2e47ebc0099e0c1e2132658dae2c5f62d85c86f50f","abstract_canon_sha256":"b367560792625e92a319ca869a41474f13d2210e35a101a08a37dd34159076f9"},"schema_version":"1.0"},"canonical_sha256":"f2913e7efdf3daafe0f798aa4b062f318c7f4cbc73afa5fec27a0da4376ce955","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:51:29.928610Z","signature_b64":"Q5ZzCPdsyav3J/WCJDVgOkVo6xcfUWHq5Nj/GFdsFrik+1pfSeyeEB0KvQrpGy26y5FnB2cm5OzF+KrBdbFTAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2913e7efdf3daafe0f798aa4b062f318c7f4cbc73afa5fec27a0da4376ce955","last_reissued_at":"2026-07-05T01:51:29.928198Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:51:29.928198Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.07195","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":"2026-07-05T01:51:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IQF4OdOlox2rz4lR8JWZqynZUf2DfomFbuLlis3k02Z9Uubzk5zsmmx4ctyoABtP0y1g7/QwxZrufyXecKfdDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T21:30:02.413276Z"},"content_sha256":"f05c39eed3dc3c691d1e559fc6b91dcc03874660676e2741653daee8e0f3abd5","schema_version":"1.0","event_id":"sha256:f05c39eed3dc3c691d1e559fc6b91dcc03874660676e2741653daee8e0f3abd5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:6KIT47X56PNK7YHXTCVEWBRPGG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Counterfactual universal quantum computation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Zhu Cao","submitted_at":"2020-11-14T02:16:49Z","abstract_excerpt":"Universal quantum computation is usually associated with interaction among two-level quantum subsystems, as this interaction is commonly viewed as a necessity to achieve universal quantum computation. In this work, we show that, contrary to this intuition, universal quantum computation can be achieved without interaction among initially independent two-level quantum subsystems. We call it counterfactual universal quantum computation. As special cases, we show how to achieve counterfactual communication of quantum states, counterfactual quantum swapping, and counterfactual quantum erasure codes"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.07195","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/2011.07195/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":"2026-07-05T01:51:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YSj1xATRSlhXk77gwWHhi58XrlWyT6Mb+pT9/9c4HudA5Wuf2r3cijUMfWAC8YKbCS6dZPgIYviIexbPvIFRAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T21:30:02.414186Z"},"content_sha256":"31ffc061bc4481692886d32224ee05dbe49f03878bdb00e0df9cd56001a3f722","schema_version":"1.0","event_id":"sha256:31ffc061bc4481692886d32224ee05dbe49f03878bdb00e0df9cd56001a3f722"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6KIT47X56PNK7YHXTCVEWBRPGG/bundle.json","state_url":"https://pith.science/pith/6KIT47X56PNK7YHXTCVEWBRPGG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6KIT47X56PNK7YHXTCVEWBRPGG/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":"2026-08-16T21:30:02Z","links":{"resolver":"https://pith.science/pith/6KIT47X56PNK7YHXTCVEWBRPGG","bundle":"https://pith.science/pith/6KIT47X56PNK7YHXTCVEWBRPGG/bundle.json","state":"https://pith.science/pith/6KIT47X56PNK7YHXTCVEWBRPGG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6KIT47X56PNK7YHXTCVEWBRPGG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:6KIT47X56PNK7YHXTCVEWBRPGG","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":"b367560792625e92a319ca869a41474f13d2210e35a101a08a37dd34159076f9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-11-14T02:16:49Z","title_canon_sha256":"6a7be21b27977f83eb793f2e47ebc0099e0c1e2132658dae2c5f62d85c86f50f"},"schema_version":"1.0","source":{"id":"2011.07195","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.07195","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"arxiv_version","alias_value":"2011.07195v1","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.07195","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"pith_short_12","alias_value":"6KIT47X56PNK","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"pith_short_16","alias_value":"6KIT47X56PNK7YHX","created_at":"2026-07-05T01:51:29Z"},{"alias_kind":"pith_short_8","alias_value":"6KIT47X5","created_at":"2026-07-05T01:51:29Z"}],"graph_snapshots":[{"event_id":"sha256:31ffc061bc4481692886d32224ee05dbe49f03878bdb00e0df9cd56001a3f722","target":"graph","created_at":"2026-07-05T01:51:29Z","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/2011.07195/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Universal quantum computation is usually associated with interaction among two-level quantum subsystems, as this interaction is commonly viewed as a necessity to achieve universal quantum computation. In this work, we show that, contrary to this intuition, universal quantum computation can be achieved without interaction among initially independent two-level quantum subsystems. We call it counterfactual universal quantum computation. As special cases, we show how to achieve counterfactual communication of quantum states, counterfactual quantum swapping, and counterfactual quantum erasure codes","authors_text":"Zhu Cao","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-11-14T02:16:49Z","title":"Counterfactual universal quantum computation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.07195","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:f05c39eed3dc3c691d1e559fc6b91dcc03874660676e2741653daee8e0f3abd5","target":"record","created_at":"2026-07-05T01:51:29Z","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":"b367560792625e92a319ca869a41474f13d2210e35a101a08a37dd34159076f9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2020-11-14T02:16:49Z","title_canon_sha256":"6a7be21b27977f83eb793f2e47ebc0099e0c1e2132658dae2c5f62d85c86f50f"},"schema_version":"1.0","source":{"id":"2011.07195","kind":"arxiv","version":1}},"canonical_sha256":"f2913e7efdf3daafe0f798aa4b062f318c7f4cbc73afa5fec27a0da4376ce955","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2913e7efdf3daafe0f798aa4b062f318c7f4cbc73afa5fec27a0da4376ce955","first_computed_at":"2026-07-05T01:51:29.928198Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:51:29.928198Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q5ZzCPdsyav3J/WCJDVgOkVo6xcfUWHq5Nj/GFdsFrik+1pfSeyeEB0KvQrpGy26y5FnB2cm5OzF+KrBdbFTAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:51:29.928610Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.07195","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f05c39eed3dc3c691d1e559fc6b91dcc03874660676e2741653daee8e0f3abd5","sha256:31ffc061bc4481692886d32224ee05dbe49f03878bdb00e0df9cd56001a3f722"],"state_sha256":"5e67134216fc6faaf42f6bbd9a6f74b9bd06150d72b8e962679ef1e4f2ad4605"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UpgCQy55yowQUXXTbFvRp4pA8ko9pG+Ovo1Ll1u5kxPsV89El2bVIxej62Kt/76sxkdvQ+x7ZAL/olcfO0InBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T21:30:02.420131Z","bundle_sha256":"b549cedea2e9e1c536bcbcd688120f14f00d3ef0f0d9efb64bc744a5bade9afa"}}