{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:QWR5E4OXEE52JCBYJTCQ6EU5LW","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":"2a475fdb655d239362c48001c56c5c206682435def17ef8d84dee8ba1262d045","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-04-25T14:46:43Z","title_canon_sha256":"e0ec2630fd06af8f2526175a34b32d0fc2c5aea19bada5c390bf45d05e84f782"},"schema_version":"1.0","source":{"id":"0804.4118","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.4118","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"arxiv_version","alias_value":"0804.4118v2","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.4118","created_at":"2026-05-18T04:27:03Z"},{"alias_kind":"pith_short_12","alias_value":"QWR5E4OXEE52","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"QWR5E4OXEE52JCBY","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"QWR5E4OX","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:c770e6dd10a88d74c673e7c57ca4e07222073016e310b378679cfa968e6bd325","target":"graph","created_at":"2026-05-18T04:27:03Z","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":"We show that any number of parties can coherently exchange any one pure quantum state for another, without communication, given prior shared entanglement. Two applications of this fact to the study of multi-prover quantum interactive proof systems are given. First, we prove that there exists a one-round two-prover quantum interactive proof system for which no finite amount of shared entanglement allows the provers to implement an optimal strategy. More specifically, for every fixed input string, there exists a sequence of strategies for the provers, with each strategy requiring more entangleme","authors_text":"Ben Toner, Debbie Leung, John Watrous","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-04-25T14:46:43Z","title":"Coherent state exchange in multi-prover quantum interactive proof systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.4118","kind":"arxiv","version":2},"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":"sha256:9003c9f6f1fa16234dc3fb6f4e59460cd9f6ac78521d75eb8890b2c50b8c0e19","target":"record","created_at":"2026-05-18T04:27:03Z","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":"2a475fdb655d239362c48001c56c5c206682435def17ef8d84dee8ba1262d045","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2008-04-25T14:46:43Z","title_canon_sha256":"e0ec2630fd06af8f2526175a34b32d0fc2c5aea19bada5c390bf45d05e84f782"},"schema_version":"1.0","source":{"id":"0804.4118","kind":"arxiv","version":2}},"canonical_sha256":"85a3d271d7213ba488384cc50f129d5da7812b66f7a63ea247de0403a25fc51f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"85a3d271d7213ba488384cc50f129d5da7812b66f7a63ea247de0403a25fc51f","first_computed_at":"2026-05-18T04:27:03.842536Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:03.842536Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/J/n2UfJwtk9LrAM/IFdcs9mLyCRxlFBAdvRi3BR8mIHJ+PmV3ucPd6o9CHnOsrbDYzyaipMvhfrYp/J/8f3Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:03.843200Z","signed_message":"canonical_sha256_bytes"},"source_id":"0804.4118","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9003c9f6f1fa16234dc3fb6f4e59460cd9f6ac78521d75eb8890b2c50b8c0e19","sha256:c770e6dd10a88d74c673e7c57ca4e07222073016e310b378679cfa968e6bd325"],"state_sha256":"cfed92ef276dfeb3b989ed9784a7e11c593f13ef62e5df2a603d384ccb142adb"}