{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:A2VCOWPGFAU56IZ7LJLGPU4IGT","short_pith_number":"pith:A2VCOWPG","canonical_record":{"source":{"id":"1703.02603","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-07T21:32:42Z","cross_cats_sorted":[],"title_canon_sha256":"7486a60ad63f0bbb6a90118820c5fa27d3e318d707456a31f6b04f837a14d95b","abstract_canon_sha256":"5fc3c8ac597ab003a79769afc3455e11662f6c3e3dbb020be50a79e267331d32"},"schema_version":"1.0"},"canonical_sha256":"06aa2759e62829df233f5a5667d38834e138b150a8745421179fe4d87bd6a65c","source":{"kind":"arxiv","id":"1703.02603","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.02603","created_at":"2026-05-18T00:38:46Z"},{"alias_kind":"arxiv_version","alias_value":"1703.02603v4","created_at":"2026-05-18T00:38:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.02603","created_at":"2026-05-18T00:38:46Z"},{"alias_kind":"pith_short_12","alias_value":"A2VCOWPGFAU5","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"A2VCOWPGFAU56IZ7","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"A2VCOWPG","created_at":"2026-05-18T12:31:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:A2VCOWPGFAU56IZ7LJLGPU4IGT","target":"record","payload":{"canonical_record":{"source":{"id":"1703.02603","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-07T21:32:42Z","cross_cats_sorted":[],"title_canon_sha256":"7486a60ad63f0bbb6a90118820c5fa27d3e318d707456a31f6b04f837a14d95b","abstract_canon_sha256":"5fc3c8ac597ab003a79769afc3455e11662f6c3e3dbb020be50a79e267331d32"},"schema_version":"1.0"},"canonical_sha256":"06aa2759e62829df233f5a5667d38834e138b150a8745421179fe4d87bd6a65c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:38:46.171709Z","signature_b64":"ju7TZSGusK5wrX1P7nG9FM/7EwnXHJNndgX55KoP6MRGwI8MU31Evq5JKUXLzEE4VXCqV0cbG/lMPfG5M1nzAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"06aa2759e62829df233f5a5667d38834e138b150a8745421179fe4d87bd6a65c","last_reissued_at":"2026-05-18T00:38:46.171079Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:38:46.171079Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.02603","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:38:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PqpckxFFLIrZoK+c4fIREx86o5LjBF7SAzkjXPDwuSMLWKfKHpLEIk9S92ZgVR+MnTRaVkB4AizsyWB1wPInBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:29:04.532302Z"},"content_sha256":"bd4613f9749947dcf9f7b929acbb58e54cd9661d103876a2aded8a00edbf6b10","schema_version":"1.0","event_id":"sha256:bd4613f9749947dcf9f7b929acbb58e54cd9661d103876a2aded8a00edbf6b10"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:A2VCOWPGFAU56IZ7LJLGPU4IGT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Asymptotic entanglement in quantum walks from delocalized initial states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alexandre C. Orthey Jr, Edgard P. M. Amorim","submitted_at":"2017-03-07T21:32:42Z","abstract_excerpt":"We study the entanglement between the internal (spin) and external (position) degrees of freedom of the one-dimensional discrete time quantum walk starting from local and delocalized initial states whose time evolution is driven by Hadamard and Fourier coins. We obtain the dependence of the asymptotic entanglement with the initial dispersion of the state and establish a way to connect the asymptotic entanglement between local and delocalized states. We find out that the delocalization of the state increases the number of initial spin states which achieves maximal entanglement from two states ("},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.02603","kind":"arxiv","version":4},"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":"2026-05-18T00:38:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DeB5yx/IAD98gj52V6osUHosHEIbS0boN7hkGgaApFFRKfpuMD09EAooOtqDLnekAAja2JumiT86xSMGwlj5Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:29:04.532864Z"},"content_sha256":"72bd59c98f1b24f4a9d2bc70d5f7a51a22d2705cdea7d6504c2697dfca8fb8ec","schema_version":"1.0","event_id":"sha256:72bd59c98f1b24f4a9d2bc70d5f7a51a22d2705cdea7d6504c2697dfca8fb8ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A2VCOWPGFAU56IZ7LJLGPU4IGT/bundle.json","state_url":"https://pith.science/pith/A2VCOWPGFAU56IZ7LJLGPU4IGT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A2VCOWPGFAU56IZ7LJLGPU4IGT/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":"2026-06-04T19:29:04Z","links":{"resolver":"https://pith.science/pith/A2VCOWPGFAU56IZ7LJLGPU4IGT","bundle":"https://pith.science/pith/A2VCOWPGFAU56IZ7LJLGPU4IGT/bundle.json","state":"https://pith.science/pith/A2VCOWPGFAU56IZ7LJLGPU4IGT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A2VCOWPGFAU56IZ7LJLGPU4IGT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:A2VCOWPGFAU56IZ7LJLGPU4IGT","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":"5fc3c8ac597ab003a79769afc3455e11662f6c3e3dbb020be50a79e267331d32","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-07T21:32:42Z","title_canon_sha256":"7486a60ad63f0bbb6a90118820c5fa27d3e318d707456a31f6b04f837a14d95b"},"schema_version":"1.0","source":{"id":"1703.02603","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.02603","created_at":"2026-05-18T00:38:46Z"},{"alias_kind":"arxiv_version","alias_value":"1703.02603v4","created_at":"2026-05-18T00:38:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.02603","created_at":"2026-05-18T00:38:46Z"},{"alias_kind":"pith_short_12","alias_value":"A2VCOWPGFAU5","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"A2VCOWPGFAU56IZ7","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"A2VCOWPG","created_at":"2026-05-18T12:31:05Z"}],"graph_snapshots":[{"event_id":"sha256:72bd59c98f1b24f4a9d2bc70d5f7a51a22d2705cdea7d6504c2697dfca8fb8ec","target":"graph","created_at":"2026-05-18T00:38:46Z","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 study the entanglement between the internal (spin) and external (position) degrees of freedom of the one-dimensional discrete time quantum walk starting from local and delocalized initial states whose time evolution is driven by Hadamard and Fourier coins. We obtain the dependence of the asymptotic entanglement with the initial dispersion of the state and establish a way to connect the asymptotic entanglement between local and delocalized states. We find out that the delocalization of the state increases the number of initial spin states which achieves maximal entanglement from two states (","authors_text":"Alexandre C. Orthey Jr, Edgard P. M. Amorim","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-07T21:32:42Z","title":"Asymptotic entanglement in quantum walks from delocalized initial states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.02603","kind":"arxiv","version":4},"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:bd4613f9749947dcf9f7b929acbb58e54cd9661d103876a2aded8a00edbf6b10","target":"record","created_at":"2026-05-18T00:38:46Z","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":"5fc3c8ac597ab003a79769afc3455e11662f6c3e3dbb020be50a79e267331d32","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-03-07T21:32:42Z","title_canon_sha256":"7486a60ad63f0bbb6a90118820c5fa27d3e318d707456a31f6b04f837a14d95b"},"schema_version":"1.0","source":{"id":"1703.02603","kind":"arxiv","version":4}},"canonical_sha256":"06aa2759e62829df233f5a5667d38834e138b150a8745421179fe4d87bd6a65c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"06aa2759e62829df233f5a5667d38834e138b150a8745421179fe4d87bd6a65c","first_computed_at":"2026-05-18T00:38:46.171079Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:38:46.171079Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ju7TZSGusK5wrX1P7nG9FM/7EwnXHJNndgX55KoP6MRGwI8MU31Evq5JKUXLzEE4VXCqV0cbG/lMPfG5M1nzAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:38:46.171709Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.02603","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd4613f9749947dcf9f7b929acbb58e54cd9661d103876a2aded8a00edbf6b10","sha256:72bd59c98f1b24f4a9d2bc70d5f7a51a22d2705cdea7d6504c2697dfca8fb8ec"],"state_sha256":"e638d4d7f7255b443bbd6779a5483b43ff8bf3d037a24755ab9224c25a954bd6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SLKa43+K6jC+DLQx6LoxuOjT5ZAV4RtBXlNbjeVznHXG5vW0NT62VBTjtBDkTln+79rspui425gnmWPPAPj1CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T19:29:04.535609Z","bundle_sha256":"cc7776ce4b80b6e2aba78d70fbdcb864c0b900e111699e9bb845878d84cb5c27"}}