{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:F6AZTIUHZCHWQOOGEYF3GWSUMS","short_pith_number":"pith:F6AZTIUH","canonical_record":{"source":{"id":"1601.03755","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-14T21:18:16Z","cross_cats_sorted":[],"title_canon_sha256":"48fea10b1ae9d4ca68a471b15a76218fe5161e95033ef7c42699bbaeea23a69a","abstract_canon_sha256":"8aad571ba1d5dceb74650ea6885f24d39a40d96b5bebcc6ff1c17d42ba66b918"},"schema_version":"1.0"},"canonical_sha256":"2f8199a287c88f6839c6260bb35a546491862eac1af451f08e939adc7418a63c","source":{"kind":"arxiv","id":"1601.03755","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.03755","created_at":"2026-05-18T01:22:32Z"},{"alias_kind":"arxiv_version","alias_value":"1601.03755v1","created_at":"2026-05-18T01:22:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.03755","created_at":"2026-05-18T01:22:32Z"},{"alias_kind":"pith_short_12","alias_value":"F6AZTIUHZCHW","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"F6AZTIUHZCHWQOOG","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"F6AZTIUH","created_at":"2026-05-18T12:30:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:F6AZTIUHZCHWQOOGEYF3GWSUMS","target":"record","payload":{"canonical_record":{"source":{"id":"1601.03755","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-14T21:18:16Z","cross_cats_sorted":[],"title_canon_sha256":"48fea10b1ae9d4ca68a471b15a76218fe5161e95033ef7c42699bbaeea23a69a","abstract_canon_sha256":"8aad571ba1d5dceb74650ea6885f24d39a40d96b5bebcc6ff1c17d42ba66b918"},"schema_version":"1.0"},"canonical_sha256":"2f8199a287c88f6839c6260bb35a546491862eac1af451f08e939adc7418a63c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:32.035223Z","signature_b64":"CNVepJ0cjhj0YTrDeIzSxXfubH1riznAxwBwN2krGXMGc44D6DWlfBnzfg0qkb8cbutK15kiqVwb4KokQvzcDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2f8199a287c88f6839c6260bb35a546491862eac1af451f08e939adc7418a63c","last_reissued_at":"2026-05-18T01:22:32.034609Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:32.034609Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.03755","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":"2026-05-18T01:22:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6nEkI/6Q4MeycTp4VkBuwA1uCKDQnwuQuPAH7213AnjsHyl+/wXbhuISBMyZikVW6+NyWUbMDgo60ZTzvV2lBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T13:31:45.264175Z"},"content_sha256":"602e767fef23255e4b4715061f3fa6dd1f2273171ec3f3a5947d317d2e36b997","schema_version":"1.0","event_id":"sha256:602e767fef23255e4b4715061f3fa6dd1f2273171ec3f3a5947d317d2e36b997"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:F6AZTIUHZCHWQOOGEYF3GWSUMS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hyperconcentration for multipartite entanglement via linear optics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Shohini Ghose, Xihan Li","submitted_at":"2016-01-14T21:18:16Z","abstract_excerpt":"We present a hyperconcentration scheme for nonlocal $N$-photon hyperentangled Greenberger-Horne-Zeilinger states. The maximally hyperentangled state, in which $N$ particles are entangled simultaneously in the polarization and the spatial mode, can be obtained with a certain probability from two partially hyperentangled states. The hyperconcentration scheme is based on one polarization parity check measurement, one spatial mode parity check measurement and N-2 single-photon two-qubit measurements. The concentration only requires linear optical elements, which makes it feasible and practical wit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.03755","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":"2026-05-18T01:22:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H9zBA64gY7f+vM61YQlTjNH7WcgNnNig6eEF0LPFfet89nqLx0x1NymkRarmSvFgPs0GvwIGXXRj22fGRw8GAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T13:31:45.264845Z"},"content_sha256":"fb0baff480f856d60cfb086d866cf83cca0e5006a94a23a178e1549274ef642f","schema_version":"1.0","event_id":"sha256:fb0baff480f856d60cfb086d866cf83cca0e5006a94a23a178e1549274ef642f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F6AZTIUHZCHWQOOGEYF3GWSUMS/bundle.json","state_url":"https://pith.science/pith/F6AZTIUHZCHWQOOGEYF3GWSUMS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F6AZTIUHZCHWQOOGEYF3GWSUMS/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":"2026-06-07T13:31:45Z","links":{"resolver":"https://pith.science/pith/F6AZTIUHZCHWQOOGEYF3GWSUMS","bundle":"https://pith.science/pith/F6AZTIUHZCHWQOOGEYF3GWSUMS/bundle.json","state":"https://pith.science/pith/F6AZTIUHZCHWQOOGEYF3GWSUMS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F6AZTIUHZCHWQOOGEYF3GWSUMS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:F6AZTIUHZCHWQOOGEYF3GWSUMS","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":"8aad571ba1d5dceb74650ea6885f24d39a40d96b5bebcc6ff1c17d42ba66b918","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-14T21:18:16Z","title_canon_sha256":"48fea10b1ae9d4ca68a471b15a76218fe5161e95033ef7c42699bbaeea23a69a"},"schema_version":"1.0","source":{"id":"1601.03755","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.03755","created_at":"2026-05-18T01:22:32Z"},{"alias_kind":"arxiv_version","alias_value":"1601.03755v1","created_at":"2026-05-18T01:22:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.03755","created_at":"2026-05-18T01:22:32Z"},{"alias_kind":"pith_short_12","alias_value":"F6AZTIUHZCHW","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"F6AZTIUHZCHWQOOG","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"F6AZTIUH","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:fb0baff480f856d60cfb086d866cf83cca0e5006a94a23a178e1549274ef642f","target":"graph","created_at":"2026-05-18T01:22:32Z","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 present a hyperconcentration scheme for nonlocal $N$-photon hyperentangled Greenberger-Horne-Zeilinger states. The maximally hyperentangled state, in which $N$ particles are entangled simultaneously in the polarization and the spatial mode, can be obtained with a certain probability from two partially hyperentangled states. The hyperconcentration scheme is based on one polarization parity check measurement, one spatial mode parity check measurement and N-2 single-photon two-qubit measurements. The concentration only requires linear optical elements, which makes it feasible and practical wit","authors_text":"Shohini Ghose, Xihan Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-14T21:18:16Z","title":"Hyperconcentration for multipartite entanglement via linear optics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.03755","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":"sha256:602e767fef23255e4b4715061f3fa6dd1f2273171ec3f3a5947d317d2e36b997","target":"record","created_at":"2026-05-18T01:22:32Z","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":"8aad571ba1d5dceb74650ea6885f24d39a40d96b5bebcc6ff1c17d42ba66b918","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-01-14T21:18:16Z","title_canon_sha256":"48fea10b1ae9d4ca68a471b15a76218fe5161e95033ef7c42699bbaeea23a69a"},"schema_version":"1.0","source":{"id":"1601.03755","kind":"arxiv","version":1}},"canonical_sha256":"2f8199a287c88f6839c6260bb35a546491862eac1af451f08e939adc7418a63c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2f8199a287c88f6839c6260bb35a546491862eac1af451f08e939adc7418a63c","first_computed_at":"2026-05-18T01:22:32.034609Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:32.034609Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CNVepJ0cjhj0YTrDeIzSxXfubH1riznAxwBwN2krGXMGc44D6DWlfBnzfg0qkb8cbutK15kiqVwb4KokQvzcDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:32.035223Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.03755","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:602e767fef23255e4b4715061f3fa6dd1f2273171ec3f3a5947d317d2e36b997","sha256:fb0baff480f856d60cfb086d866cf83cca0e5006a94a23a178e1549274ef642f"],"state_sha256":"099d6d8dff6ffdbdfd57412f72d0832dca52c2f1a2d177447c2b66c62ba21b7d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0FAo8hyDF+v14wdjRN5YF1LKDmWPSSK/2rVwVmPcoCeW3b7H8QM+gea7kEh2rfyKoWiF5SFf9FPhvPTrfDJqCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T13:31:45.268545Z","bundle_sha256":"ff2df2c0e60c3b15faefc9fdd4461459bf078cbaef6a647174373e7ad3a4bad7"}}