{"paper":{"title":"Weak values and weak coupling maximizing the output of weak measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"quant-ph","authors_text":"Antonio Di Lorenzo","submitted_at":"2013-07-17T07:51:57Z","abstract_excerpt":"In a weak measurement, the average output $\\langle o\\rangle$ of a probe that measures an observable $\\hat{A}$ of a quantum system undergoing both a preparation in a state $\\rho_i$ and a postselection in a state $E_\\mathrm{f}$ is, to a good approximation, a function of the weak value $A_w=\\mathrm{Tr} [E_f \\hat{A} \\rho_i]/\\mathrm{Tr}[E_f\\rho_i]$, a complex number. For a fixed coupling $\\lambda$, when the overlap $\\mathrm{Tr}[E_f\\rho_i]$ is very small, $A_w$ diverges, but $\\langle o\\rangle$ stays finite, often tending to zero for symmetry reasons. This paper answers the questions: what is the wea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4524","kind":"arxiv","version":4},"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"}