{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:D37ZGIW2L6FMLV5HMSQR63N673","short_pith_number":"pith:D37ZGIW2","canonical_record":{"source":{"id":"2107.12007","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-07-26T07:52:13Z","cross_cats_sorted":["physics.ed-ph"],"title_canon_sha256":"127dbd771ed16a65a03c526b1910ce9b4bdee86fbce10bf1ba1d928a12953fc3","abstract_canon_sha256":"f76a1429681d1de882386513690bd91ecc6a742c04cbf6ae0aabb1cd0cda35f1"},"schema_version":"1.0"},"canonical_sha256":"1eff9322da5f8ac5d7a764a11f6dbefee2a710f98f3bb9eb00b9131e7e92896f","source":{"kind":"arxiv","id":"2107.12007","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.12007","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"arxiv_version","alias_value":"2107.12007v3","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.12007","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"pith_short_12","alias_value":"D37ZGIW2L6FM","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"pith_short_16","alias_value":"D37ZGIW2L6FMLV5H","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"pith_short_8","alias_value":"D37ZGIW2","created_at":"2026-07-05T08:26:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:D37ZGIW2L6FMLV5HMSQR63N673","target":"record","payload":{"canonical_record":{"source":{"id":"2107.12007","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-07-26T07:52:13Z","cross_cats_sorted":["physics.ed-ph"],"title_canon_sha256":"127dbd771ed16a65a03c526b1910ce9b4bdee86fbce10bf1ba1d928a12953fc3","abstract_canon_sha256":"f76a1429681d1de882386513690bd91ecc6a742c04cbf6ae0aabb1cd0cda35f1"},"schema_version":"1.0"},"canonical_sha256":"1eff9322da5f8ac5d7a764a11f6dbefee2a710f98f3bb9eb00b9131e7e92896f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:26:54.528936Z","signature_b64":"yFRKI1OS6RHQvvnO6ALzZfO3lbkkOIuIgcaaXNTAQ+6gwzdC7lmDubnlr7G0AzzYRqxbnrMjFiZWzoW1b8j7DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1eff9322da5f8ac5d7a764a11f6dbefee2a710f98f3bb9eb00b9131e7e92896f","last_reissued_at":"2026-07-05T08:26:54.528547Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:26:54.528547Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.12007","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":"2026-07-05T08:26:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P74/YA73utyWz3sf9tpHU9NUy78DK3bVH58yYT6hc6NKz4W6mz9CX2l+y9Sp3ql0DwydqaOkWYSObi7fs+bMAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T05:53:34.326834Z"},"content_sha256":"6f49ea5112e39e542318a4f4519eb39a7b3a9b3e15c01aa5bd07f32a00bd864e","schema_version":"1.0","event_id":"sha256:6f49ea5112e39e542318a4f4519eb39a7b3a9b3e15c01aa5bd07f32a00bd864e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:D37ZGIW2L6FMLV5HMSQR63N673","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Endless Fun in high dimensions -- A Quantum Card Game","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.ed-ph"],"primary_cat":"quant-ph","authors_text":"Lea Kopf, Markus Hiekkam\\\"aki, Robert Fickler, Shashi Prabhakar","submitted_at":"2021-07-26T07:52:13Z","abstract_excerpt":"Quantum technologies, i.e., technologies benefiting from the features of quantum physics such as objective randomness, superposition, and entanglement, have enabled an entirely different way of distributing and processing information. The enormous progress over the last decades has also led to an urgent need for young professionals and new educational programs. Here, we present a strategic card game in which the building blocks of a quantum computer can be experienced. While playing, participants start with the lowest quantum state, play cards to \"program\" a quantum computer, and aim to achiev"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.12007","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/2107.12007/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":"2026-07-05T08:26:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ukZblTxf4Fms3Jt7nk1YysTMSJ3UXL52zjs0cBQqtZEuCv+jp9RZmCFqQ3aqAXkhuSVnh7rCYM92PtAggibmCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T05:53:34.327461Z"},"content_sha256":"813f8494cc147936b213e34dfdfc50064a2d1eb92936d466596d0e460827b18f","schema_version":"1.0","event_id":"sha256:813f8494cc147936b213e34dfdfc50064a2d1eb92936d466596d0e460827b18f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D37ZGIW2L6FMLV5HMSQR63N673/bundle.json","state_url":"https://pith.science/pith/D37ZGIW2L6FMLV5HMSQR63N673/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D37ZGIW2L6FMLV5HMSQR63N673/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":"2026-08-12T05:53:34Z","links":{"resolver":"https://pith.science/pith/D37ZGIW2L6FMLV5HMSQR63N673","bundle":"https://pith.science/pith/D37ZGIW2L6FMLV5HMSQR63N673/bundle.json","state":"https://pith.science/pith/D37ZGIW2L6FMLV5HMSQR63N673/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D37ZGIW2L6FMLV5HMSQR63N673/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:D37ZGIW2L6FMLV5HMSQR63N673","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":"f76a1429681d1de882386513690bd91ecc6a742c04cbf6ae0aabb1cd0cda35f1","cross_cats_sorted":["physics.ed-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-07-26T07:52:13Z","title_canon_sha256":"127dbd771ed16a65a03c526b1910ce9b4bdee86fbce10bf1ba1d928a12953fc3"},"schema_version":"1.0","source":{"id":"2107.12007","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.12007","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"arxiv_version","alias_value":"2107.12007v3","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.12007","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"pith_short_12","alias_value":"D37ZGIW2L6FM","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"pith_short_16","alias_value":"D37ZGIW2L6FMLV5H","created_at":"2026-07-05T08:26:54Z"},{"alias_kind":"pith_short_8","alias_value":"D37ZGIW2","created_at":"2026-07-05T08:26:54Z"}],"graph_snapshots":[{"event_id":"sha256:813f8494cc147936b213e34dfdfc50064a2d1eb92936d466596d0e460827b18f","target":"graph","created_at":"2026-07-05T08:26:54Z","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/2107.12007/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum technologies, i.e., technologies benefiting from the features of quantum physics such as objective randomness, superposition, and entanglement, have enabled an entirely different way of distributing and processing information. The enormous progress over the last decades has also led to an urgent need for young professionals and new educational programs. Here, we present a strategic card game in which the building blocks of a quantum computer can be experienced. While playing, participants start with the lowest quantum state, play cards to \"program\" a quantum computer, and aim to achiev","authors_text":"Lea Kopf, Markus Hiekkam\\\"aki, Robert Fickler, Shashi Prabhakar","cross_cats":["physics.ed-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-07-26T07:52:13Z","title":"Endless Fun in high dimensions -- A Quantum Card Game"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.12007","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":"sha256:6f49ea5112e39e542318a4f4519eb39a7b3a9b3e15c01aa5bd07f32a00bd864e","target":"record","created_at":"2026-07-05T08:26:54Z","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":"f76a1429681d1de882386513690bd91ecc6a742c04cbf6ae0aabb1cd0cda35f1","cross_cats_sorted":["physics.ed-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-07-26T07:52:13Z","title_canon_sha256":"127dbd771ed16a65a03c526b1910ce9b4bdee86fbce10bf1ba1d928a12953fc3"},"schema_version":"1.0","source":{"id":"2107.12007","kind":"arxiv","version":3}},"canonical_sha256":"1eff9322da5f8ac5d7a764a11f6dbefee2a710f98f3bb9eb00b9131e7e92896f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1eff9322da5f8ac5d7a764a11f6dbefee2a710f98f3bb9eb00b9131e7e92896f","first_computed_at":"2026-07-05T08:26:54.528547Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:26:54.528547Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yFRKI1OS6RHQvvnO6ALzZfO3lbkkOIuIgcaaXNTAQ+6gwzdC7lmDubnlr7G0AzzYRqxbnrMjFiZWzoW1b8j7DA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:26:54.528936Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.12007","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f49ea5112e39e542318a4f4519eb39a7b3a9b3e15c01aa5bd07f32a00bd864e","sha256:813f8494cc147936b213e34dfdfc50064a2d1eb92936d466596d0e460827b18f"],"state_sha256":"b376bb6a72809b13beee335235a788a9f333fe562128fea687b7ada0aec45fbf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VbFMg3PTubtIyfWazOdY0iw5+IbfAJMLQDWKJY0WY8U+zhPoyV1/4G9TK56chn+GHwa9c+Ja/GlrD7bx86PPDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T05:53:34.333626Z","bundle_sha256":"d00c23c8f64153daaf1056e60844e90a0764d70b44390d1945a5633af4fc5f40"}}