{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:U2SBPGEPYV66PQZFICIJNF64KQ","short_pith_number":"pith:U2SBPGEP","canonical_record":{"source":{"id":"1407.5424","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-21T09:10:51Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"5a2783905ec37703f03a739aab16984ae668e5bf94769e3947460665306ec48c","abstract_canon_sha256":"21563808b6be70a3230fe4f1b7672b84ae06b25963582c4f32160606b9310986"},"schema_version":"1.0"},"canonical_sha256":"a6a417988fc57de7c32540909697dc5433f78a2d0350c06805d72f4c4b454968","source":{"kind":"arxiv","id":"1407.5424","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.5424","created_at":"2026-05-18T02:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"1407.5424v2","created_at":"2026-05-18T02:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.5424","created_at":"2026-05-18T02:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"U2SBPGEPYV66","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"U2SBPGEPYV66PQZF","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"U2SBPGEP","created_at":"2026-05-18T12:28:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:U2SBPGEPYV66PQZFICIJNF64KQ","target":"record","payload":{"canonical_record":{"source":{"id":"1407.5424","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-21T09:10:51Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"5a2783905ec37703f03a739aab16984ae668e5bf94769e3947460665306ec48c","abstract_canon_sha256":"21563808b6be70a3230fe4f1b7672b84ae06b25963582c4f32160606b9310986"},"schema_version":"1.0"},"canonical_sha256":"a6a417988fc57de7c32540909697dc5433f78a2d0350c06805d72f4c4b454968","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:18:13.618932Z","signature_b64":"cuhZyrI/io0fVIiAAwFj2KlVmjOHJlnDr/J5wEQ8mHKtRbpmWfsg9TqaV6fQFAJMgOntj3pY/C7dXCuLRKGECg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6a417988fc57de7c32540909697dc5433f78a2d0350c06805d72f4c4b454968","last_reissued_at":"2026-05-18T02:18:13.618526Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:18:13.618526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.5424","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:18:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pzpphBaDRKlnP7sAPftGS0m2vHCJTvlO+3ei8gHXgwU5+OsqIr+8jfl/2P49sNRAo7RxEuUyLYvRTw9auIR6AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:20:40.431486Z"},"content_sha256":"ecf997b7ac8af9311497cc53972142052e963441479cd4a1e68b1067874705cd","schema_version":"1.0","event_id":"sha256:ecf997b7ac8af9311497cc53972142052e963441479cd4a1e68b1067874705cd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:U2SBPGEPYV66PQZFICIJNF64KQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum walks and wavepacket dynamics on a lattice with twisted photons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Corrado de Lisio, Domenico Paparo, Ebrahim Karimi, Enrico Santamato, Fabio Sciarrino, Filippo Cardano, Francesco Massa, Hammam Qassim, Lorenzo Marrucci, Robert W. Boyd, Sergei Slussarenko","submitted_at":"2014-07-21T09:10:51Z","abstract_excerpt":"The \"quantum walk\" has emerged recently as a paradigmatic process for the dynamic simulation of complex quantum systems, entanglement production and quantum computation. Hitherto, photonic implementations of quantum walks have mainly been based on multi-path interferometric schemes in real space. Here, we report the experimental realization of a discrete quantum walk taking place in the orbital angular momentum space of light, both for a single photon and for two simultaneous photons. In contrast to previous implementations, the whole process develops in a single light beam, with no need of in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.5424","kind":"arxiv","version":2},"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":"2026-05-18T02:18:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fIehp/uqFCXOt55+N5ojf1dezlMLSqfBCPO3MBs/6/G2roZoHjYg69AmxehfKqvXkM/RK3L5C/dhPNwQp6l1AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:20:40.432189Z"},"content_sha256":"67747a5c7790c4c398aba056742e71ac501fcfa94dd44a5b98e503c8bea1674f","schema_version":"1.0","event_id":"sha256:67747a5c7790c4c398aba056742e71ac501fcfa94dd44a5b98e503c8bea1674f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U2SBPGEPYV66PQZFICIJNF64KQ/bundle.json","state_url":"https://pith.science/pith/U2SBPGEPYV66PQZFICIJNF64KQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U2SBPGEPYV66PQZFICIJNF64KQ/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":"2026-05-25T18:20:40Z","links":{"resolver":"https://pith.science/pith/U2SBPGEPYV66PQZFICIJNF64KQ","bundle":"https://pith.science/pith/U2SBPGEPYV66PQZFICIJNF64KQ/bundle.json","state":"https://pith.science/pith/U2SBPGEPYV66PQZFICIJNF64KQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U2SBPGEPYV66PQZFICIJNF64KQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:U2SBPGEPYV66PQZFICIJNF64KQ","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":"21563808b6be70a3230fe4f1b7672b84ae06b25963582c4f32160606b9310986","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-21T09:10:51Z","title_canon_sha256":"5a2783905ec37703f03a739aab16984ae668e5bf94769e3947460665306ec48c"},"schema_version":"1.0","source":{"id":"1407.5424","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.5424","created_at":"2026-05-18T02:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"1407.5424v2","created_at":"2026-05-18T02:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.5424","created_at":"2026-05-18T02:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"U2SBPGEPYV66","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"U2SBPGEPYV66PQZF","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"U2SBPGEP","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:67747a5c7790c4c398aba056742e71ac501fcfa94dd44a5b98e503c8bea1674f","target":"graph","created_at":"2026-05-18T02:18:13Z","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":"The \"quantum walk\" has emerged recently as a paradigmatic process for the dynamic simulation of complex quantum systems, entanglement production and quantum computation. Hitherto, photonic implementations of quantum walks have mainly been based on multi-path interferometric schemes in real space. Here, we report the experimental realization of a discrete quantum walk taking place in the orbital angular momentum space of light, both for a single photon and for two simultaneous photons. In contrast to previous implementations, the whole process develops in a single light beam, with no need of in","authors_text":"Corrado de Lisio, Domenico Paparo, Ebrahim Karimi, Enrico Santamato, Fabio Sciarrino, Filippo Cardano, Francesco Massa, Hammam Qassim, Lorenzo Marrucci, Robert W. Boyd, Sergei Slussarenko","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-21T09:10:51Z","title":"Quantum walks and wavepacket dynamics on a lattice with twisted photons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.5424","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:ecf997b7ac8af9311497cc53972142052e963441479cd4a1e68b1067874705cd","target":"record","created_at":"2026-05-18T02:18:13Z","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":"21563808b6be70a3230fe4f1b7672b84ae06b25963582c4f32160606b9310986","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-21T09:10:51Z","title_canon_sha256":"5a2783905ec37703f03a739aab16984ae668e5bf94769e3947460665306ec48c"},"schema_version":"1.0","source":{"id":"1407.5424","kind":"arxiv","version":2}},"canonical_sha256":"a6a417988fc57de7c32540909697dc5433f78a2d0350c06805d72f4c4b454968","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6a417988fc57de7c32540909697dc5433f78a2d0350c06805d72f4c4b454968","first_computed_at":"2026-05-18T02:18:13.618526Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:18:13.618526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cuhZyrI/io0fVIiAAwFj2KlVmjOHJlnDr/J5wEQ8mHKtRbpmWfsg9TqaV6fQFAJMgOntj3pY/C7dXCuLRKGECg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:18:13.618932Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.5424","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ecf997b7ac8af9311497cc53972142052e963441479cd4a1e68b1067874705cd","sha256:67747a5c7790c4c398aba056742e71ac501fcfa94dd44a5b98e503c8bea1674f"],"state_sha256":"f1b91c9a82533ff98c18ebe66978d4bf8b342bb9f551421095922b644b2db347"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"63+LrJTXsnER73O5SZE6HUADwEDelszNnale7PqTjb4MGHkHYaHU9mghT358pZf9NiVbp+ViAF5MefLgftZxAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T18:20:40.435989Z","bundle_sha256":"a4a4cd16d4e1b8f6930ad9a196d14d327a88848229ee2d3eabc74dd8c8147e31"}}