{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:SRRYQCQP7F5F6JLO7NXKD4BVXC","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":"d1010300ab6c4f97ca07cd36fe0795ac5eca3be7bd2ddca9329cd334cf4a9513","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-11-26T17:18:15Z","title_canon_sha256":"e1b5e42187a4716a615762db3a295b6f35e37fc18d6783b10214dc8e4e88d5ba"},"schema_version":"1.0","source":{"id":"2111.13610","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.13610","created_at":"2026-07-05T03:39:48Z"},{"alias_kind":"arxiv_version","alias_value":"2111.13610v2","created_at":"2026-07-05T03:39:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.13610","created_at":"2026-07-05T03:39:48Z"},{"alias_kind":"pith_short_12","alias_value":"SRRYQCQP7F5F","created_at":"2026-07-05T03:39:48Z"},{"alias_kind":"pith_short_16","alias_value":"SRRYQCQP7F5F6JLO","created_at":"2026-07-05T03:39:48Z"},{"alias_kind":"pith_short_8","alias_value":"SRRYQCQP","created_at":"2026-07-05T03:39:48Z"}],"graph_snapshots":[{"event_id":"sha256:cf9355e0e6244b7198337d509a6ff8442aa105fe2a5b103fd13217ee24004baa","target":"graph","created_at":"2026-07-05T03:39:48Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2111.13610/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We explore the suitability of a Virtually-Imaged Phased Array (VIPA) as a Spectral-to-Spatial Mode-Mapper (SSMM) for applications in quantum communication such as a quantum repeater. To this end we demonstrate spectrally-resolved two-photon \"Hong-Ou-Mandel\" (HOM) interference. Spectral sidebands are generated on a common optical carrier and weak coherent pulses are prepared in each spectral mode. The pulses are subsequently sent to a beamsplitter followed by two SSMMs and two single-photon detectors, allowing us to measure spectrally-resolved HOM interference. We show that the so-called HOM di","authors_text":"Gustavo Castro do Amaral, Joshua A. Slater, Oriol Pietx-Casas, Remon Berrevoets, Tanmoy Chakraborty, Thomas Middelburg, Wolfgang Tittel","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-11-26T17:18:15Z","title":"Spectrally Multiplexed Hong-Ou-Mandel Interference"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.13610","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":"sha256:57a01c87d595fcdc5d07364ddf2da22e5a2b1fb6b35bcd2deab2ade30d120a92","target":"record","created_at":"2026-07-05T03:39:48Z","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":"d1010300ab6c4f97ca07cd36fe0795ac5eca3be7bd2ddca9329cd334cf4a9513","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-11-26T17:18:15Z","title_canon_sha256":"e1b5e42187a4716a615762db3a295b6f35e37fc18d6783b10214dc8e4e88d5ba"},"schema_version":"1.0","source":{"id":"2111.13610","kind":"arxiv","version":2}},"canonical_sha256":"9463880a0ff97a5f256efb6ea1f035b8be987609a08f85da2252a896fa38b175","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9463880a0ff97a5f256efb6ea1f035b8be987609a08f85da2252a896fa38b175","first_computed_at":"2026-07-05T03:39:48.735758Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:39:48.735758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c9LgoFcxQFiO1FEL6a+UcU91pdYVYJWHhEA/gqvNWrAPPAeeATNRkbnQdgALT/U7pBZSLAXU8LrpJRvY77ujDw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:39:48.736237Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.13610","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:57a01c87d595fcdc5d07364ddf2da22e5a2b1fb6b35bcd2deab2ade30d120a92","sha256:cf9355e0e6244b7198337d509a6ff8442aa105fe2a5b103fd13217ee24004baa"],"state_sha256":"410536e78ac8e94965467585e5af6142dccdf0d8d17d78e9eec8c78906499cd5"}