{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:SG7TAMXAICQCIZLNKRRIZXSTJP","short_pith_number":"pith:SG7TAMXA","canonical_record":{"source":{"id":"1005.2219","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-12T22:27:31Z","cross_cats_sorted":[],"title_canon_sha256":"9b08184e13ef71ccf3b13a2709d50e9368f3eef8a84b564d11370d7b0afde4cc","abstract_canon_sha256":"da79d42d65c66aa7208cc815c366c05de5e5c1efaf3f75ff54b498c34ce41703"},"schema_version":"1.0"},"canonical_sha256":"91bf3032e040a024656d54628cde534bc4360db6f3b563c7e3b28393a621a0e7","source":{"kind":"arxiv","id":"1005.2219","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.2219","created_at":"2026-05-18T04:30:14Z"},{"alias_kind":"arxiv_version","alias_value":"1005.2219v1","created_at":"2026-05-18T04:30:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.2219","created_at":"2026-05-18T04:30:14Z"},{"alias_kind":"pith_short_12","alias_value":"SG7TAMXAICQC","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"SG7TAMXAICQCIZLN","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"SG7TAMXA","created_at":"2026-05-18T12:26:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:SG7TAMXAICQCIZLNKRRIZXSTJP","target":"record","payload":{"canonical_record":{"source":{"id":"1005.2219","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-12T22:27:31Z","cross_cats_sorted":[],"title_canon_sha256":"9b08184e13ef71ccf3b13a2709d50e9368f3eef8a84b564d11370d7b0afde4cc","abstract_canon_sha256":"da79d42d65c66aa7208cc815c366c05de5e5c1efaf3f75ff54b498c34ce41703"},"schema_version":"1.0"},"canonical_sha256":"91bf3032e040a024656d54628cde534bc4360db6f3b563c7e3b28393a621a0e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:30:14.391687Z","signature_b64":"9IpYZqmJZCnZBUC+yj2sEGJ4pkaukskO5pKW14nnxQpqk6L2U0GKm4Zpi6LBAg1i07knxJnMinpaav3tLVLyDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"91bf3032e040a024656d54628cde534bc4360db6f3b563c7e3b28393a621a0e7","last_reissued_at":"2026-05-18T04:30:14.390989Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:30:14.390989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1005.2219","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":"2026-05-18T04:30:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8qETs0LlmueuNEPE3n+p/yBbzjuG0ajZhr/g5pzbFIg+VVTkzlMlfKlhTiwiEJWjlltJwsvYisyjXG/bTTJWAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:40:18.230255Z"},"content_sha256":"0475fd7e18cd898f5e744dcb06303101a24f19c262bb660c40c32526a3491ad8","schema_version":"1.0","event_id":"sha256:0475fd7e18cd898f5e744dcb06303101a24f19c262bb660c40c32526a3491ad8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:SG7TAMXAICQCIZLNKRRIZXSTJP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Closed timelike curves via post-selection: theory and experimental demonstration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Aephraim M. Steinberg, Ardavan Darabi, Lee A. Rozema, Lorenzo Maccone, Lynden K. Shalm, Raul Garcia-Patron, Seth Lloyd, Stefano Pirandola, Vittorio Giovannetti, Yasaman Soudagar, Yutaka Shikano","submitted_at":"2010-05-12T22:27:31Z","abstract_excerpt":"Closed timelike curves (CTCs) are trajectories in spacetime that effectively travel backwards in time: a test particle following a CTC can in principle interact with its former self in the past. CTCs appear in many solutions of Einstein's field equations and any future quantum version of general relativity will have to reconcile them with the requirements of quantum mechanics and of quantum field theory.  A widely accepted quantum theory of CTCs was proposed by Deutsch.  Here we explore an alternative quantum formulation of CTCs and show that it is physically inequivalent to Deutsch's.  Becaus"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.2219","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":""},"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":"2026-05-18T04:30:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m9biplghPHZO6qUtqsadmPHaEP6Qi1DNEo001rnrF0U6u2uCCJeKUqZRipYeFFshOJsj5EbE1h6J20Sj7R4YDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:40:18.230900Z"},"content_sha256":"c98fcb4cdb7868b1fd2b28f1e830d641ae8af79df3ebfbe000dc219b50ed8b30","schema_version":"1.0","event_id":"sha256:c98fcb4cdb7868b1fd2b28f1e830d641ae8af79df3ebfbe000dc219b50ed8b30"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SG7TAMXAICQCIZLNKRRIZXSTJP/bundle.json","state_url":"https://pith.science/pith/SG7TAMXAICQCIZLNKRRIZXSTJP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SG7TAMXAICQCIZLNKRRIZXSTJP/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":"2026-05-27T12:40:18Z","links":{"resolver":"https://pith.science/pith/SG7TAMXAICQCIZLNKRRIZXSTJP","bundle":"https://pith.science/pith/SG7TAMXAICQCIZLNKRRIZXSTJP/bundle.json","state":"https://pith.science/pith/SG7TAMXAICQCIZLNKRRIZXSTJP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SG7TAMXAICQCIZLNKRRIZXSTJP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:SG7TAMXAICQCIZLNKRRIZXSTJP","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":"da79d42d65c66aa7208cc815c366c05de5e5c1efaf3f75ff54b498c34ce41703","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-12T22:27:31Z","title_canon_sha256":"9b08184e13ef71ccf3b13a2709d50e9368f3eef8a84b564d11370d7b0afde4cc"},"schema_version":"1.0","source":{"id":"1005.2219","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.2219","created_at":"2026-05-18T04:30:14Z"},{"alias_kind":"arxiv_version","alias_value":"1005.2219v1","created_at":"2026-05-18T04:30:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.2219","created_at":"2026-05-18T04:30:14Z"},{"alias_kind":"pith_short_12","alias_value":"SG7TAMXAICQC","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"SG7TAMXAICQCIZLN","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"SG7TAMXA","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:c98fcb4cdb7868b1fd2b28f1e830d641ae8af79df3ebfbe000dc219b50ed8b30","target":"graph","created_at":"2026-05-18T04:30:14Z","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":"Closed timelike curves (CTCs) are trajectories in spacetime that effectively travel backwards in time: a test particle following a CTC can in principle interact with its former self in the past. CTCs appear in many solutions of Einstein's field equations and any future quantum version of general relativity will have to reconcile them with the requirements of quantum mechanics and of quantum field theory.  A widely accepted quantum theory of CTCs was proposed by Deutsch.  Here we explore an alternative quantum formulation of CTCs and show that it is physically inequivalent to Deutsch's.  Becaus","authors_text":"Aephraim M. Steinberg, Ardavan Darabi, Lee A. Rozema, Lorenzo Maccone, Lynden K. Shalm, Raul Garcia-Patron, Seth Lloyd, Stefano Pirandola, Vittorio Giovannetti, Yasaman Soudagar, Yutaka Shikano","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-12T22:27:31Z","title":"Closed timelike curves via post-selection: theory and experimental demonstration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.2219","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":"sha256:0475fd7e18cd898f5e744dcb06303101a24f19c262bb660c40c32526a3491ad8","target":"record","created_at":"2026-05-18T04:30:14Z","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":"da79d42d65c66aa7208cc815c366c05de5e5c1efaf3f75ff54b498c34ce41703","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-05-12T22:27:31Z","title_canon_sha256":"9b08184e13ef71ccf3b13a2709d50e9368f3eef8a84b564d11370d7b0afde4cc"},"schema_version":"1.0","source":{"id":"1005.2219","kind":"arxiv","version":1}},"canonical_sha256":"91bf3032e040a024656d54628cde534bc4360db6f3b563c7e3b28393a621a0e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"91bf3032e040a024656d54628cde534bc4360db6f3b563c7e3b28393a621a0e7","first_computed_at":"2026-05-18T04:30:14.390989Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:30:14.390989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9IpYZqmJZCnZBUC+yj2sEGJ4pkaukskO5pKW14nnxQpqk6L2U0GKm4Zpi6LBAg1i07knxJnMinpaav3tLVLyDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:30:14.391687Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.2219","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0475fd7e18cd898f5e744dcb06303101a24f19c262bb660c40c32526a3491ad8","sha256:c98fcb4cdb7868b1fd2b28f1e830d641ae8af79df3ebfbe000dc219b50ed8b30"],"state_sha256":"f5d2fb9f14ad4b36876b0d17dfeca0dc176476d8b88fe9149eb47f5aca30e504"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VBwCZ7/EJvaHHaLwtLwxQJwL4Ou6gbKlL1EMTVHy9CJpev+gI6fkIRtD4bcGO1ZW9MDBANtato0ax+quPrHeDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:40:18.234464Z","bundle_sha256":"6db1fc8ac1abf6b73317f457b7e32e382322abbf13385c6d42a9c4c53b00bf14"}}