{"paper":{"title":"Sub Shot-Noise interferometric phase sensitivity with Beryllium ions Schroedinger Cat States","license":"","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"quant-ph","authors_text":"Augusto Smerzi, Luca Pezz\\'e","submitted_at":"2006-06-26T20:54:30Z","abstract_excerpt":"Interferometry with NOON quantum states can provide unbiased phase estimation with a sensitivity scaling as $\\Delta \\theta \\sim 1/N_T$ given a prior knowledge that the true phase shift $\\theta$ lies in the interval $-\\pi \\leq \\theta \\leq \\pi$. The protocol requires a total of $N_T = 2^{p}-1$ particles (unequally) distributed among $p$ independent measurements and overcomes basic difficulties present in previously proposed approaches. We demonstrate the possibility to obtain a phase sensitivity beating the classical shot-noise limit using published probabilities retrieved experimentally for the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0606221","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"}