{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:JOB5237U6B5FHJX2XDOMEHL7W5","short_pith_number":"pith:JOB5237U","canonical_record":{"source":{"id":"1104.4189","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-21T07:06:12Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1cb1a41dee0fdbf39c805b1598493274743ff49c2e4f26af3500a9b38dc12cef","abstract_canon_sha256":"f3cc72f8b7ad7c683f3523c7f0173848190ebdecd6ecac2656019134f6e09084"},"schema_version":"1.0"},"canonical_sha256":"4b83dd6ff4f07a53a6fab8dcc21d7fb74ba40763c142c6b4e5ff9aa2c7b1a4af","source":{"kind":"arxiv","id":"1104.4189","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.4189","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"arxiv_version","alias_value":"1104.4189v1","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.4189","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"pith_short_12","alias_value":"JOB5237U6B5F","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"JOB5237U6B5FHJX2","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"JOB5237U","created_at":"2026-05-18T12:26:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:JOB5237U6B5FHJX2XDOMEHL7W5","target":"record","payload":{"canonical_record":{"source":{"id":"1104.4189","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-21T07:06:12Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1cb1a41dee0fdbf39c805b1598493274743ff49c2e4f26af3500a9b38dc12cef","abstract_canon_sha256":"f3cc72f8b7ad7c683f3523c7f0173848190ebdecd6ecac2656019134f6e09084"},"schema_version":"1.0"},"canonical_sha256":"4b83dd6ff4f07a53a6fab8dcc21d7fb74ba40763c142c6b4e5ff9aa2c7b1a4af","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:44.921633Z","signature_b64":"laXuFr8GotIrs3LOR4CfMkusI/FnC48MwBMrD0S97zjlr3KdtGkJcXuPmCYOAu8P+KwYLODHzPZfvaX24+BoDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4b83dd6ff4f07a53a6fab8dcc21d7fb74ba40763c142c6b4e5ff9aa2c7b1a4af","last_reissued_at":"2026-05-18T04:23:44.921136Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:44.921136Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.4189","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":"2026-05-18T04:23:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+FlAHpC2CXrz+DFHTsJ4AnY2kCAIveHW6caxgz6Ld/v5EvS3ts6t29KqbzKH2XT8mRhBrXlzt5xjEKspcqNNBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T01:27:37.636439Z"},"content_sha256":"51c918f2308f581ea439ee5c3613de63a31b213be2598b63b81772ffc36d1e76","schema_version":"1.0","event_id":"sha256:51c918f2308f581ea439ee5c3613de63a31b213be2598b63b81772ffc36d1e76"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:JOB5237U6B5FHJX2XDOMEHL7W5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photon subtraction from traveling fields - recent experimental demonstrations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Hiroki Takahashi, Jonas S. Neergaard-Nielsen, Kazuhiro Hayasaka, Kentaro Wakui, Makoto Takeuchi, Masahide Sasaki, Masahiro Takeoka","submitted_at":"2011-04-21T07:06:12Z","abstract_excerpt":"We review our most recent results on application of the photon subtraction technique for optical quantum information processing primitives, in particular entanglement distillation and generation of squeezed qubit states. As an introduction we provide a brief summary of other experimental accomplishments in the field."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.4189","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":"2026-05-18T04:23:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H55e60R3SKjprqPdM1NiJvmErNzl2nU12MGg+8cKlJJ3T8M2fVRkFjXVAGvSQV1mwVmYCRzrSufUDmzOa3caDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T01:27:37.637072Z"},"content_sha256":"70edadc09b92f29c9ae9f259f18b666cd1df9a4654c4e11886c35717f4bd768d","schema_version":"1.0","event_id":"sha256:70edadc09b92f29c9ae9f259f18b666cd1df9a4654c4e11886c35717f4bd768d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JOB5237U6B5FHJX2XDOMEHL7W5/bundle.json","state_url":"https://pith.science/pith/JOB5237U6B5FHJX2XDOMEHL7W5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JOB5237U6B5FHJX2XDOMEHL7W5/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":"2026-05-23T01:27:37Z","links":{"resolver":"https://pith.science/pith/JOB5237U6B5FHJX2XDOMEHL7W5","bundle":"https://pith.science/pith/JOB5237U6B5FHJX2XDOMEHL7W5/bundle.json","state":"https://pith.science/pith/JOB5237U6B5FHJX2XDOMEHL7W5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JOB5237U6B5FHJX2XDOMEHL7W5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:JOB5237U6B5FHJX2XDOMEHL7W5","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":"f3cc72f8b7ad7c683f3523c7f0173848190ebdecd6ecac2656019134f6e09084","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-21T07:06:12Z","title_canon_sha256":"1cb1a41dee0fdbf39c805b1598493274743ff49c2e4f26af3500a9b38dc12cef"},"schema_version":"1.0","source":{"id":"1104.4189","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.4189","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"arxiv_version","alias_value":"1104.4189v1","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.4189","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"pith_short_12","alias_value":"JOB5237U6B5F","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"JOB5237U6B5FHJX2","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"JOB5237U","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:70edadc09b92f29c9ae9f259f18b666cd1df9a4654c4e11886c35717f4bd768d","target":"graph","created_at":"2026-05-18T04:23:44Z","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 review our most recent results on application of the photon subtraction technique for optical quantum information processing primitives, in particular entanglement distillation and generation of squeezed qubit states. As an introduction we provide a brief summary of other experimental accomplishments in the field.","authors_text":"Hiroki Takahashi, Jonas S. Neergaard-Nielsen, Kazuhiro Hayasaka, Kentaro Wakui, Makoto Takeuchi, Masahide Sasaki, Masahiro Takeoka","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-21T07:06:12Z","title":"Photon subtraction from traveling fields - recent experimental demonstrations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.4189","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":"sha256:51c918f2308f581ea439ee5c3613de63a31b213be2598b63b81772ffc36d1e76","target":"record","created_at":"2026-05-18T04:23:44Z","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":"f3cc72f8b7ad7c683f3523c7f0173848190ebdecd6ecac2656019134f6e09084","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-21T07:06:12Z","title_canon_sha256":"1cb1a41dee0fdbf39c805b1598493274743ff49c2e4f26af3500a9b38dc12cef"},"schema_version":"1.0","source":{"id":"1104.4189","kind":"arxiv","version":1}},"canonical_sha256":"4b83dd6ff4f07a53a6fab8dcc21d7fb74ba40763c142c6b4e5ff9aa2c7b1a4af","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b83dd6ff4f07a53a6fab8dcc21d7fb74ba40763c142c6b4e5ff9aa2c7b1a4af","first_computed_at":"2026-05-18T04:23:44.921136Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:44.921136Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"laXuFr8GotIrs3LOR4CfMkusI/FnC48MwBMrD0S97zjlr3KdtGkJcXuPmCYOAu8P+KwYLODHzPZfvaX24+BoDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:44.921633Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.4189","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:51c918f2308f581ea439ee5c3613de63a31b213be2598b63b81772ffc36d1e76","sha256:70edadc09b92f29c9ae9f259f18b666cd1df9a4654c4e11886c35717f4bd768d"],"state_sha256":"fcc8ac4e4e6c74ffe03d63ad533d029fd088ee0d762f1c62bb31490b7ec433f3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"enq7Lhe/PnjbJsZz0LNoDPgkwwQPC443CvDfd115xhJVlG6isQvNKkX0mPWh/VEUCQe5ynFpVr+hINy5N8YSCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T01:27:37.640630Z","bundle_sha256":"865243d6e5e22d3b076c93f5d64f3ad049f7de8f55d0dc6104b2f3e21c5287a0"}}