{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:6H76MBHVMHRVWM34CJELCVOD7S","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":"dc8f5ea8d0d64020909f7515182649575761c2420913738c203265ac6ead1f2b","cross_cats_sorted":["cs.SY","math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-08-11T01:20:41Z","title_canon_sha256":"c9abc5b6ff6ef922949ced0c28bc70d7e72cf34e74c413bf5185613547126c5f"},"schema_version":"1.0","source":{"id":"1408.2290","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.2290","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"arxiv_version","alias_value":"1408.2290v1","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.2290","created_at":"2026-05-18T00:54:03Z"},{"alias_kind":"pith_short_12","alias_value":"6H76MBHVMHRV","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"6H76MBHVMHRVWM34","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"6H76MBHV","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:b1871385b596825c37196664290392b47ab908d37780cc25343b8a4f96d3d507","target":"graph","created_at":"2026-05-18T00:54:03Z","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":"This paper provides an alternative approach to the problem of preparing pure Gaussian states in a linear quantum system. It is shown that any pure Gaussian state can be generated by a cascade of one-dimensional open quantum harmonic oscillators, without any direct interaction Hamiltonians between these oscillators. This is physically advantageous from an experimental point of view. An example on the preparation of two-mode squeezed states is given to illustrate the theory.","authors_text":"Ian R. Petersen, Matthew J. Woolley, Naoki Yamamoto, Shan Ma","cross_cats":["cs.SY","math.OC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-08-11T01:20:41Z","title":"Preparation of Pure Gaussian States via Cascaded Quantum Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.2290","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":"sha256:4470e6aba728b042a3a11b6a7ffc65b887d69187fc1129c683e01f88a795ef96","target":"record","created_at":"2026-05-18T00:54:03Z","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":"dc8f5ea8d0d64020909f7515182649575761c2420913738c203265ac6ead1f2b","cross_cats_sorted":["cs.SY","math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-08-11T01:20:41Z","title_canon_sha256":"c9abc5b6ff6ef922949ced0c28bc70d7e72cf34e74c413bf5185613547126c5f"},"schema_version":"1.0","source":{"id":"1408.2290","kind":"arxiv","version":1}},"canonical_sha256":"f1ffe604f561e35b337c1248b155c3fc8137962a43b714c0e7119b39ea4f01fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f1ffe604f561e35b337c1248b155c3fc8137962a43b714c0e7119b39ea4f01fb","first_computed_at":"2026-05-18T00:54:03.997270Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:54:03.997270Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MdRuSUuAmsN8h7DanHBWX+M8RrVfw1Mp4K0DI72gftyFfbEkCbiZOuw8YaNREvP9oBkUNZKxVZmg/EfutYWRAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:54:03.997687Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.2290","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4470e6aba728b042a3a11b6a7ffc65b887d69187fc1129c683e01f88a795ef96","sha256:b1871385b596825c37196664290392b47ab908d37780cc25343b8a4f96d3d507"],"state_sha256":"41abae0aae6c256056a78b8b110bc85df8dd28a5eb7af0819c05a1f05d71cb04"}