{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:Q3LGCRZSEE7EY3MF2E4EFMBADS","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":"5842fb913c6f019194d242ef479a6506b69fda92de2f18a905c3c3f3ba954fc0","cross_cats_sorted":["math-ph","math.MP","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-07-27T07:53:00Z","title_canon_sha256":"194c51cbea5a568f9771f1145dba51c6edf3c47d7c7ada257a31a74d96be69cc"},"schema_version":"1.0","source":{"id":"1507.07322","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.07322","created_at":"2026-05-18T01:35:01Z"},{"alias_kind":"arxiv_version","alias_value":"1507.07322v2","created_at":"2026-05-18T01:35:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.07322","created_at":"2026-05-18T01:35:01Z"},{"alias_kind":"pith_short_12","alias_value":"Q3LGCRZSEE7E","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"Q3LGCRZSEE7EY3MF","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"Q3LGCRZS","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:aad209942479cfd674c8ccc5cb14978a72871f052a7829047ebec9aca921c9d0","target":"graph","created_at":"2026-05-18T01:35:01Z","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 investigate, within the weak measurement theory, the advantages of non-classical pointer states over semi-classical ones for coherent, squeezed vacuum, and Schr\\\"{o}inger cat states. These states are utilized as pointer state for the system operator $\\hat{A}$ with property $\\hat{A}^{2}=\\hat{I}$, where $\\hat{I}$ represents the identity operator. We calculate the ratio between the signal-to-noise ratio (SNR) of non-postselected and postselected weak measurements. The latter is used to find the quantum Fisher information for the above pointer states. The average shifts for those pointer states","authors_text":"Chang-Pu Sun, M. Al-Amri, W. Maimaiti, Yusuf Turek, Yutaka Shikano","cross_cats":["math-ph","math.MP","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-07-27T07:53:00Z","title":"Advantages of nonclassical pointer states in postselected weak measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.07322","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":"sha256:131f0324967982299211c6f160c7baa3525a3af58b6d34f2129f1269a07fca7e","target":"record","created_at":"2026-05-18T01:35:01Z","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":"5842fb913c6f019194d242ef479a6506b69fda92de2f18a905c3c3f3ba954fc0","cross_cats_sorted":["math-ph","math.MP","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-07-27T07:53:00Z","title_canon_sha256":"194c51cbea5a568f9771f1145dba51c6edf3c47d7c7ada257a31a74d96be69cc"},"schema_version":"1.0","source":{"id":"1507.07322","kind":"arxiv","version":2}},"canonical_sha256":"86d6614732213e4c6d85d13842b0201cbf973f4a5be3a5519c4fac02ec057828","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"86d6614732213e4c6d85d13842b0201cbf973f4a5be3a5519c4fac02ec057828","first_computed_at":"2026-05-18T01:35:01.624020Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:01.624020Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zJ5uUUM/znaV1tlG7XcM6G07U5xwrLTQq/ajbH6zhI1kY/+C9mAWZA9EumHx1w+OlvO5i089SFllkvEE6C6hDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:01.624687Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.07322","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:131f0324967982299211c6f160c7baa3525a3af58b6d34f2129f1269a07fca7e","sha256:aad209942479cfd674c8ccc5cb14978a72871f052a7829047ebec9aca921c9d0"],"state_sha256":"cf71b864636f33447c07642301282130bfb51574725eb847f07ec7d8bc42ce50"}