Kapustin's hyperkähler Fukaya–deformation-quantisation correspondence

Let (X,I,J,K)(\mathrm{X},\mathrm{I},\mathrm{J},\mathrm{K}) be a hyperkähler manifold with symplectic form ωJ\omega_\mathrm{J}, and set

σI=ωJ+iωK.\sigma_\mathrm{I}=\omega_\mathrm{J}+i\omega_\mathrm{K}.

Let DF(X,ωJ)\mathcal{DF}(\mathrm{X},\omega_\mathrm{J}) be the Fukaya category and let Ddg,h(W^X)\mathbf{D}_{\mathrm{dg,h}}(\widehat{\mathscr{W}}_\mathrm{X}) be the differential graded category of holonomic deformation-quantisation modules. Kapustin's correspondence conjecture. There is a quasi-equivalence

DF(X,ωJ)IndNov/C(())(Ddg,h(W^X)),\mathcal{DF}(\mathrm{X},\omega_\mathrm{J})\simeq \mathrm{Ind}_{\mathrm{Nov}/\mathbf{C}((\hbar))}\left(\mathbf{D}_{\mathrm{dg,h}}(\widehat{\mathscr{W}}_\mathrm{X})\right),

between the Fukaya category and the category associated to the holomorphic symplectic manifold (X,I,σI)(\mathrm{X},\mathrm{I},\sigma_\mathrm{I}). This is a categorical form of the A/B-brane duality suggested by Kapustin; the paper presents it as a conjectural correspondence and does not prove it.

Sources & referencesView supporting material

Primary source

Borislav Mladenov, “Differential graded categories in holomorphic symplectic geometry”, arXiv:2604.06630 (2026).

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