{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:NULCBMIQTYAQ4HF3SOG5D64XVN","short_pith_number":"pith:NULCBMIQ","canonical_record":{"source":{"id":"1403.4194","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-03-17T18:08:40Z","cross_cats_sorted":[],"title_canon_sha256":"21e5fd2f6033a3caa312cf3671e944117b816539883ca131a447fca3127bb05e","abstract_canon_sha256":"d08aac7c9b79e7290187c01e7ca6e284a3d010ab9bca673a9aea73913b8a4caf"},"schema_version":"1.0"},"canonical_sha256":"6d1620b1109e010e1cbb938dd1fb97ab62df0affa54c5621c5108bdc3cba5024","source":{"kind":"arxiv","id":"1403.4194","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.4194","created_at":"2026-05-18T02:32:54Z"},{"alias_kind":"arxiv_version","alias_value":"1403.4194v2","created_at":"2026-05-18T02:32:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.4194","created_at":"2026-05-18T02:32:54Z"},{"alias_kind":"pith_short_12","alias_value":"NULCBMIQTYAQ","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"NULCBMIQTYAQ4HF3","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"NULCBMIQ","created_at":"2026-05-18T12:28:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:NULCBMIQTYAQ4HF3SOG5D64XVN","target":"record","payload":{"canonical_record":{"source":{"id":"1403.4194","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-03-17T18:08:40Z","cross_cats_sorted":[],"title_canon_sha256":"21e5fd2f6033a3caa312cf3671e944117b816539883ca131a447fca3127bb05e","abstract_canon_sha256":"d08aac7c9b79e7290187c01e7ca6e284a3d010ab9bca673a9aea73913b8a4caf"},"schema_version":"1.0"},"canonical_sha256":"6d1620b1109e010e1cbb938dd1fb97ab62df0affa54c5621c5108bdc3cba5024","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:32:54.093276Z","signature_b64":"znH3KIHZrt/V00kwxCb7Vg83bxznTZzDTNjioN6Rcw4noHm/oaEkSvQPK7YQNq7BcXKZfMVy5CWabZE22ZSLCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d1620b1109e010e1cbb938dd1fb97ab62df0affa54c5621c5108bdc3cba5024","last_reissued_at":"2026-05-18T02:32:54.092732Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:32:54.092732Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1403.4194","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":"2026-05-18T02:32:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8ToLuHZu1Dzl5R7kN8Ix2a7VS2EOCf4WbMQSR6uXbs7bv2Jb8gm6vpnlQEmmK/KxClnNb+COsDf21pPwIrDoDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T18:39:24.602967Z"},"content_sha256":"6c4189fd86ced4e8697b1f562207c51e22fdd46d9cfb37b0ed68563ae95341ce","schema_version":"1.0","event_id":"sha256:6c4189fd86ced4e8697b1f562207c51e22fdd46d9cfb37b0ed68563ae95341ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:NULCBMIQTYAQ4HF3SOG5D64XVN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum non-Gaussian Depth of Single-Photon States","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Ana Predojevi\\'c, Glenn S. Solomon, Gregor Weihs, Ivo Straka, Lorenz Butschek, Luk\\'a\\v{s} Lachman, Martina Mikov\\'a, Michal Mi\\v{c}uda, Miroslav Je\\v{z}ek, Radim Filip, Tobias Huber","submitted_at":"2014-03-17T18:08:40Z","abstract_excerpt":"We introduce and experimentally explore the concept of quantum non-Gaussian depth of single-photon states with a positive Wigner function. The depth measures the robustness of a single-photon state against optical losses. The directly witnessed quantum non-Gaussianity withstands significant attenuation, exhibiting a depth of 18 dB, while the nonclassicality remains unchanged. Quantum non-Gaussian depth is an experimentally approachable quantity that is much more robust than the negativity of the Wigner function. Furthermore, we use it to reveal significant differences between otherwise strongl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.4194","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":"2026-05-18T02:32:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hqcAWMf51JT4ZmkUdBIk6JwzTU2+YJ3Lc31bLZ7tfUTNC6iku2c17AitBIDNYZersoF1ROugEEaoLa/gUt/HCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T18:39:24.603590Z"},"content_sha256":"7eb1fc6e46aefe62b14624faf55c396be9d64c455f44ebfa58e88b060fc2230a","schema_version":"1.0","event_id":"sha256:7eb1fc6e46aefe62b14624faf55c396be9d64c455f44ebfa58e88b060fc2230a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NULCBMIQTYAQ4HF3SOG5D64XVN/bundle.json","state_url":"https://pith.science/pith/NULCBMIQTYAQ4HF3SOG5D64XVN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NULCBMIQTYAQ4HF3SOG5D64XVN/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":"2026-05-22T18:39:24Z","links":{"resolver":"https://pith.science/pith/NULCBMIQTYAQ4HF3SOG5D64XVN","bundle":"https://pith.science/pith/NULCBMIQTYAQ4HF3SOG5D64XVN/bundle.json","state":"https://pith.science/pith/NULCBMIQTYAQ4HF3SOG5D64XVN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NULCBMIQTYAQ4HF3SOG5D64XVN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:NULCBMIQTYAQ4HF3SOG5D64XVN","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":"d08aac7c9b79e7290187c01e7ca6e284a3d010ab9bca673a9aea73913b8a4caf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-03-17T18:08:40Z","title_canon_sha256":"21e5fd2f6033a3caa312cf3671e944117b816539883ca131a447fca3127bb05e"},"schema_version":"1.0","source":{"id":"1403.4194","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.4194","created_at":"2026-05-18T02:32:54Z"},{"alias_kind":"arxiv_version","alias_value":"1403.4194v2","created_at":"2026-05-18T02:32:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.4194","created_at":"2026-05-18T02:32:54Z"},{"alias_kind":"pith_short_12","alias_value":"NULCBMIQTYAQ","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"NULCBMIQTYAQ4HF3","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"NULCBMIQ","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:7eb1fc6e46aefe62b14624faf55c396be9d64c455f44ebfa58e88b060fc2230a","target":"graph","created_at":"2026-05-18T02:32:54Z","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 introduce and experimentally explore the concept of quantum non-Gaussian depth of single-photon states with a positive Wigner function. The depth measures the robustness of a single-photon state against optical losses. The directly witnessed quantum non-Gaussianity withstands significant attenuation, exhibiting a depth of 18 dB, while the nonclassicality remains unchanged. Quantum non-Gaussian depth is an experimentally approachable quantity that is much more robust than the negativity of the Wigner function. Furthermore, we use it to reveal significant differences between otherwise strongl","authors_text":"Ana Predojevi\\'c, Glenn S. Solomon, Gregor Weihs, Ivo Straka, Lorenz Butschek, Luk\\'a\\v{s} Lachman, Martina Mikov\\'a, Michal Mi\\v{c}uda, Miroslav Je\\v{z}ek, Radim Filip, Tobias Huber","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-03-17T18:08:40Z","title":"Quantum non-Gaussian Depth of Single-Photon States"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.4194","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":"sha256:6c4189fd86ced4e8697b1f562207c51e22fdd46d9cfb37b0ed68563ae95341ce","target":"record","created_at":"2026-05-18T02:32:54Z","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":"d08aac7c9b79e7290187c01e7ca6e284a3d010ab9bca673a9aea73913b8a4caf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-03-17T18:08:40Z","title_canon_sha256":"21e5fd2f6033a3caa312cf3671e944117b816539883ca131a447fca3127bb05e"},"schema_version":"1.0","source":{"id":"1403.4194","kind":"arxiv","version":2}},"canonical_sha256":"6d1620b1109e010e1cbb938dd1fb97ab62df0affa54c5621c5108bdc3cba5024","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d1620b1109e010e1cbb938dd1fb97ab62df0affa54c5621c5108bdc3cba5024","first_computed_at":"2026-05-18T02:32:54.092732Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:32:54.092732Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"znH3KIHZrt/V00kwxCb7Vg83bxznTZzDTNjioN6Rcw4noHm/oaEkSvQPK7YQNq7BcXKZfMVy5CWabZE22ZSLCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:32:54.093276Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.4194","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6c4189fd86ced4e8697b1f562207c51e22fdd46d9cfb37b0ed68563ae95341ce","sha256:7eb1fc6e46aefe62b14624faf55c396be9d64c455f44ebfa58e88b060fc2230a"],"state_sha256":"119298cfca627a22f967a626af3f6d1c83a304b5d600ab1166223230523de96c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hNYJE7rY2hDkDQrJmTStiVddfL5VuVXyY0epSVa5dPXmzTk+m7KgkWCLJDKermOiLuD9ynHHSRthErl00xnABA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T18:39:24.607573Z","bundle_sha256":"1827aa3b7d20038b62a017ed8cc142b76388ab5acc53a30f577c220b5ca7e2c5"}}