{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:W62GS3E4P3WAMIV7NRIDLYARLB","short_pith_number":"pith:W62GS3E4","canonical_record":{"source":{"id":"0905.3725","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-22T17:11:37Z","cross_cats_sorted":[],"title_canon_sha256":"c96e9f46358a708b80b8eaa1f3426bc0133ea456df6b1ed1fe09beb37ab1a9c8","abstract_canon_sha256":"7edc4d140557d50eb7114fc7468991345cdb59c66b13f7ef9f72da1060e3fa6c"},"schema_version":"1.0"},"canonical_sha256":"b7b4696c9c7eec0622bf6c5035e011586e504ecefc18f4097a6d82dd1852b3e2","source":{"kind":"arxiv","id":"0905.3725","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.3725","created_at":"2026-05-18T02:13:37Z"},{"alias_kind":"arxiv_version","alias_value":"0905.3725v2","created_at":"2026-05-18T02:13:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.3725","created_at":"2026-05-18T02:13:37Z"},{"alias_kind":"pith_short_12","alias_value":"W62GS3E4P3WA","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"W62GS3E4P3WAMIV7","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"W62GS3E4","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:W62GS3E4P3WAMIV7NRIDLYARLB","target":"record","payload":{"canonical_record":{"source":{"id":"0905.3725","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-22T17:11:37Z","cross_cats_sorted":[],"title_canon_sha256":"c96e9f46358a708b80b8eaa1f3426bc0133ea456df6b1ed1fe09beb37ab1a9c8","abstract_canon_sha256":"7edc4d140557d50eb7114fc7468991345cdb59c66b13f7ef9f72da1060e3fa6c"},"schema_version":"1.0"},"canonical_sha256":"b7b4696c9c7eec0622bf6c5035e011586e504ecefc18f4097a6d82dd1852b3e2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:37.963875Z","signature_b64":"0LnxoH6SHV+EmOcS3zKhQp/SGcEMS5o9NQwL+AbRbyMJotKeEvkspiYV+gTNU86xmvDzFdnDJV4ORbwBEnMADQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b7b4696c9c7eec0622bf6c5035e011586e504ecefc18f4097a6d82dd1852b3e2","last_reissued_at":"2026-05-18T02:13:37.963436Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:37.963436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0905.3725","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":"2026-05-18T02:13:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0rudW29KFH4u8/SGQpo6yRsi8sivids0Ty8EfVodS1Nm+C3mAD1K2mJipiobYDFw9NNddUXZMmytpp+RsTjXAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T00:03:13.251383Z"},"content_sha256":"f35c4ef6b56bdc6df7a9376f69d4f636bcb487274bdb3127af1852dd30ec9da2","schema_version":"1.0","event_id":"sha256:f35c4ef6b56bdc6df7a9376f69d4f636bcb487274bdb3127af1852dd30ec9da2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:W62GS3E4P3WAMIV7NRIDLYARLB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bandwidth-tunable single photon source in an ion trap quantum network","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"C. Schuck, F. Dubin, F. Rohde, J. Eschner, J. Huwer, M. Almendros, M. Hennrich, N. Piro","submitted_at":"2009-05-22T17:11:37Z","abstract_excerpt":"We report a tunable single-photon source based on a single trapped ion. Employing spontaneous Raman scattering and in-vacuum optics with large numerical aperture, single photons are efficiently created with controlled temporal shape and coherence time. These can be varied between 70 ns and 1.6 $\\mu$s, as characterized by operating two sources simultaneously in two remote ion traps which reveals mutual and individual coherence through two-photon interference."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.3725","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":"2026-05-18T02:13:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oWuQKYRhIyJCkMYwfbYVJiT9kuNfsetTfHJW12/3R0d7/KZOwPjueJDOi7FFwXzJZ+0G4OEJl3r4Ikr6XuK3Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T00:03:13.252136Z"},"content_sha256":"49aa1673fc53520b7d86da808ca4a8bf49debfbe3a45b828eee09514908d2a62","schema_version":"1.0","event_id":"sha256:49aa1673fc53520b7d86da808ca4a8bf49debfbe3a45b828eee09514908d2a62"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W62GS3E4P3WAMIV7NRIDLYARLB/bundle.json","state_url":"https://pith.science/pith/W62GS3E4P3WAMIV7NRIDLYARLB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W62GS3E4P3WAMIV7NRIDLYARLB/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":"2026-05-20T00:03:13Z","links":{"resolver":"https://pith.science/pith/W62GS3E4P3WAMIV7NRIDLYARLB","bundle":"https://pith.science/pith/W62GS3E4P3WAMIV7NRIDLYARLB/bundle.json","state":"https://pith.science/pith/W62GS3E4P3WAMIV7NRIDLYARLB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W62GS3E4P3WAMIV7NRIDLYARLB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:W62GS3E4P3WAMIV7NRIDLYARLB","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":"7edc4d140557d50eb7114fc7468991345cdb59c66b13f7ef9f72da1060e3fa6c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-22T17:11:37Z","title_canon_sha256":"c96e9f46358a708b80b8eaa1f3426bc0133ea456df6b1ed1fe09beb37ab1a9c8"},"schema_version":"1.0","source":{"id":"0905.3725","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.3725","created_at":"2026-05-18T02:13:37Z"},{"alias_kind":"arxiv_version","alias_value":"0905.3725v2","created_at":"2026-05-18T02:13:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.3725","created_at":"2026-05-18T02:13:37Z"},{"alias_kind":"pith_short_12","alias_value":"W62GS3E4P3WA","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"W62GS3E4P3WAMIV7","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"W62GS3E4","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:49aa1673fc53520b7d86da808ca4a8bf49debfbe3a45b828eee09514908d2a62","target":"graph","created_at":"2026-05-18T02:13:37Z","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 report a tunable single-photon source based on a single trapped ion. Employing spontaneous Raman scattering and in-vacuum optics with large numerical aperture, single photons are efficiently created with controlled temporal shape and coherence time. These can be varied between 70 ns and 1.6 $\\mu$s, as characterized by operating two sources simultaneously in two remote ion traps which reveals mutual and individual coherence through two-photon interference.","authors_text":"C. Schuck, F. Dubin, F. Rohde, J. Eschner, J. Huwer, M. Almendros, M. Hennrich, N. Piro","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-22T17:11:37Z","title":"Bandwidth-tunable single photon source in an ion trap quantum network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.3725","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:f35c4ef6b56bdc6df7a9376f69d4f636bcb487274bdb3127af1852dd30ec9da2","target":"record","created_at":"2026-05-18T02:13:37Z","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":"7edc4d140557d50eb7114fc7468991345cdb59c66b13f7ef9f72da1060e3fa6c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-22T17:11:37Z","title_canon_sha256":"c96e9f46358a708b80b8eaa1f3426bc0133ea456df6b1ed1fe09beb37ab1a9c8"},"schema_version":"1.0","source":{"id":"0905.3725","kind":"arxiv","version":2}},"canonical_sha256":"b7b4696c9c7eec0622bf6c5035e011586e504ecefc18f4097a6d82dd1852b3e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b7b4696c9c7eec0622bf6c5035e011586e504ecefc18f4097a6d82dd1852b3e2","first_computed_at":"2026-05-18T02:13:37.963436Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:37.963436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0LnxoH6SHV+EmOcS3zKhQp/SGcEMS5o9NQwL+AbRbyMJotKeEvkspiYV+gTNU86xmvDzFdnDJV4ORbwBEnMADQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:37.963875Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.3725","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f35c4ef6b56bdc6df7a9376f69d4f636bcb487274bdb3127af1852dd30ec9da2","sha256:49aa1673fc53520b7d86da808ca4a8bf49debfbe3a45b828eee09514908d2a62"],"state_sha256":"de34b4c05ade2143ed7c87519708943ddf812a003a2c403f98c072e8e0a8ca72"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"keBiK2uSYg/BIaK1m+y3ajVpOjswmua3F3KbbLSWIZkcTOnFSz000qfhyy2SKtldQ7N6dUeKgpeHHI5cMAyJDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T00:03:13.255755Z","bundle_sha256":"97782e67ba66d746fc82179575d2df7e67989ca506322f98d1a193ece29accfe"}}