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Circularly polarized light introduces helicity as a symmetry\u2010defined degree of freedom; however, the conversion into persistent analog memory remains challenging. This study demonstrates that optical helicity biases the electrically driven formation of persistent analog conductance states in chiral quasi\u2010two\u2010dimensional perovskite synapses. Within the (R\/S\u2010PEA)\n                    <jats:sub>2<\/jats:sub>\n                    MA\n                    <jats:italic>\n                      <jats:sub>n<\/jats:sub>\n                    <\/jats:italic>\n                    <jats:sub>\u20101<\/jats:sub>\n                    Pb\n                    <jats:sub>n<\/jats:sub>\n                    I\n                    <jats:sub>3<\/jats:sub>\n                    <jats:italic>\n                      <jats:sub>n<\/jats:sub>\n                    <\/jats:italic>\n                    <jats:sub>+1<\/jats:sub>\n                    multi\u2010quantum\u2010well series, the\n                    <jats:italic>n<\/jats:italic>\n                    = 3 composition provided the optimal convergence of chiroptical selectivity, layered structural registry, and transport\u2010supporting structural order, enabling reproducible low\u2010nonlinearity analog weight updates and 72 statistically distinguishable conductance states retained over 10\n                    <jats:sup>6<\/jats:sup>\n                    \u00a0s. An independently evaluated read\u2010noise\u2010informed framework yielded a read\u2010noise\u2010limited capacity estimate of 72.3 levels, providing a quantitative link between measured read noise and analog\u2010state capacity. In conclusion, optical helicity can be encoded into, retained in, and read from electrically programmed analog conductance states, providing a persistent state variable for neuromorphic computation.\n                  <\/jats:p>","DOI":"10.1002\/adma.75308","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T05:49:42Z","timestamp":1791265782000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Helicity\u2010Defined Analog Conductance States in Chiral Perovskite Synapses"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-2908-8440","authenticated-orcid":false,"given":"Min Jong","family":"Lee","sequence":"first","affiliation":[{"name":"School of Electrical Engineering Korea University  Seoul Republic of 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