{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:RHU3KUPS5FVSJVY4JQMPXVYE5O","short_pith_number":"pith:RHU3KUPS","canonical_record":{"source":{"id":"1609.02412","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-08T13:21:31Z","cross_cats_sorted":[],"title_canon_sha256":"738b866204be1952f268b2f27a1e9a03cea80b78d4198d67e87e020e4493a74a","abstract_canon_sha256":"36dafb2d4b0623cf5ce3ff109f461e55184a85ac0cf4e4f0e325184e458d4d38"},"schema_version":"1.0"},"canonical_sha256":"89e9b551f2e96b24d71c4c18fbd704eba4aed3b5d57ba122d39c094755d62a34","source":{"kind":"arxiv","id":"1609.02412","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.02412","created_at":"2026-05-18T00:42:17Z"},{"alias_kind":"arxiv_version","alias_value":"1609.02412v1","created_at":"2026-05-18T00:42:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.02412","created_at":"2026-05-18T00:42:17Z"},{"alias_kind":"pith_short_12","alias_value":"RHU3KUPS5FVS","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RHU3KUPS5FVSJVY4","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RHU3KUPS","created_at":"2026-05-18T12:30:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:RHU3KUPS5FVSJVY4JQMPXVYE5O","target":"record","payload":{"canonical_record":{"source":{"id":"1609.02412","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-08T13:21:31Z","cross_cats_sorted":[],"title_canon_sha256":"738b866204be1952f268b2f27a1e9a03cea80b78d4198d67e87e020e4493a74a","abstract_canon_sha256":"36dafb2d4b0623cf5ce3ff109f461e55184a85ac0cf4e4f0e325184e458d4d38"},"schema_version":"1.0"},"canonical_sha256":"89e9b551f2e96b24d71c4c18fbd704eba4aed3b5d57ba122d39c094755d62a34","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:17.730623Z","signature_b64":"GdwcX9N3ZzVtrGiKqi93nLjSEziFhaX7SBHYC2WB7eqYOkf5gaZOhDxpcMTkgGvqmFdPY5Xbk1hrTa4Sh+KLDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"89e9b551f2e96b24d71c4c18fbd704eba4aed3b5d57ba122d39c094755d62a34","last_reissued_at":"2026-05-18T00:42:17.730101Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:17.730101Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.02412","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":"2026-05-18T00:42:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D2m2GBQxyU0pkvzcx5X1PUjbiDwnvaWkgMftlIItXi+egajIapn+Ju4Cc3PvWfyda9bX7sl7ztw8BfdY4sasBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T16:36:55.647140Z"},"content_sha256":"435afb48759f43e97ecb0fe5cc2ef5bc74b643596f65e95735fe566ccda608a7","schema_version":"1.0","event_id":"sha256:435afb48759f43e97ecb0fe5cc2ef5bc74b643596f65e95735fe566ccda608a7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:RHU3KUPS5FVSJVY4JQMPXVYE5O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum-enhanced metrology without entanglement based on optical cavities with feedback","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Adam Stokes, Almut Beige, Gangcheng Wang, Lewis A. Clark, M. Mubashir Khan","submitted_at":"2016-09-08T13:21:31Z","abstract_excerpt":"There are a number of different strategies to measure the phase shift between two pathways of light more efficiently than suggested by the standard quantum limit. One way is to use highly entangled photons. Another way is to expose photons to a non-linear or interacting Hamiltonian. This paper emphasises that the conditional dynamics of open quantum systems provides an interesting additional tool for quantum-enhanced metrology. As a concrete example, we review a recent scheme which exploits the conditional dynamics of a laser-driven optical cavity with spontaneous photon emission inside a quan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.02412","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":"2026-05-18T00:42:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7MA0V55cdprYjpueD/LL3fuOgPg6ajfkjh03eoaEg1zIY0g/65lCQXOJkyO7gEEQR5YIaK+Tzn3UwbSvZM6zAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T16:36:55.647679Z"},"content_sha256":"12193875e12907683356bd2f66dbacb6d775be60f55f70498b1cfc517886b40a","schema_version":"1.0","event_id":"sha256:12193875e12907683356bd2f66dbacb6d775be60f55f70498b1cfc517886b40a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RHU3KUPS5FVSJVY4JQMPXVYE5O/bundle.json","state_url":"https://pith.science/pith/RHU3KUPS5FVSJVY4JQMPXVYE5O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RHU3KUPS5FVSJVY4JQMPXVYE5O/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":"2026-05-29T16:36:55Z","links":{"resolver":"https://pith.science/pith/RHU3KUPS5FVSJVY4JQMPXVYE5O","bundle":"https://pith.science/pith/RHU3KUPS5FVSJVY4JQMPXVYE5O/bundle.json","state":"https://pith.science/pith/RHU3KUPS5FVSJVY4JQMPXVYE5O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RHU3KUPS5FVSJVY4JQMPXVYE5O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:RHU3KUPS5FVSJVY4JQMPXVYE5O","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":"36dafb2d4b0623cf5ce3ff109f461e55184a85ac0cf4e4f0e325184e458d4d38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-08T13:21:31Z","title_canon_sha256":"738b866204be1952f268b2f27a1e9a03cea80b78d4198d67e87e020e4493a74a"},"schema_version":"1.0","source":{"id":"1609.02412","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.02412","created_at":"2026-05-18T00:42:17Z"},{"alias_kind":"arxiv_version","alias_value":"1609.02412v1","created_at":"2026-05-18T00:42:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.02412","created_at":"2026-05-18T00:42:17Z"},{"alias_kind":"pith_short_12","alias_value":"RHU3KUPS5FVS","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RHU3KUPS5FVSJVY4","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RHU3KUPS","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:12193875e12907683356bd2f66dbacb6d775be60f55f70498b1cfc517886b40a","target":"graph","created_at":"2026-05-18T00:42:17Z","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":"There are a number of different strategies to measure the phase shift between two pathways of light more efficiently than suggested by the standard quantum limit. One way is to use highly entangled photons. Another way is to expose photons to a non-linear or interacting Hamiltonian. This paper emphasises that the conditional dynamics of open quantum systems provides an interesting additional tool for quantum-enhanced metrology. As a concrete example, we review a recent scheme which exploits the conditional dynamics of a laser-driven optical cavity with spontaneous photon emission inside a quan","authors_text":"Adam Stokes, Almut Beige, Gangcheng Wang, Lewis A. Clark, M. Mubashir Khan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-08T13:21:31Z","title":"Quantum-enhanced metrology without entanglement based on optical cavities with feedback"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.02412","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":"sha256:435afb48759f43e97ecb0fe5cc2ef5bc74b643596f65e95735fe566ccda608a7","target":"record","created_at":"2026-05-18T00:42:17Z","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":"36dafb2d4b0623cf5ce3ff109f461e55184a85ac0cf4e4f0e325184e458d4d38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-09-08T13:21:31Z","title_canon_sha256":"738b866204be1952f268b2f27a1e9a03cea80b78d4198d67e87e020e4493a74a"},"schema_version":"1.0","source":{"id":"1609.02412","kind":"arxiv","version":1}},"canonical_sha256":"89e9b551f2e96b24d71c4c18fbd704eba4aed3b5d57ba122d39c094755d62a34","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"89e9b551f2e96b24d71c4c18fbd704eba4aed3b5d57ba122d39c094755d62a34","first_computed_at":"2026-05-18T00:42:17.730101Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:17.730101Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GdwcX9N3ZzVtrGiKqi93nLjSEziFhaX7SBHYC2WB7eqYOkf5gaZOhDxpcMTkgGvqmFdPY5Xbk1hrTa4Sh+KLDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:17.730623Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.02412","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:435afb48759f43e97ecb0fe5cc2ef5bc74b643596f65e95735fe566ccda608a7","sha256:12193875e12907683356bd2f66dbacb6d775be60f55f70498b1cfc517886b40a"],"state_sha256":"017bf459eb00c1ba6f3095b96398e86b8d4733e963c4c3531d71079c1414ec3b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"trKknSB4dIijf2qEvKs8gLizYtr0w7BzfCPGAWCRxoM6eJhHdBdvAq4yuR5oncITWn1O6GZ7Yo2m/zk6aJhjDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T16:36:55.650829Z","bundle_sha256":"dfafbc7bc0565c15946049f06eb4c382159870db0eb3f99120ad62aeb379b7e2"}}