Perverse-sheaf and BV-quantization conjecture for shifted symplectic stacks

Let (X,ω)(\mathsf{X}, \omega) be a (1)(-1)-shifted symplectic Artin stack equipped with orientation data, namely a square root det(LX)12\det(\mathbb{L}_\mathsf{X})^{\frac12} of its determinant line. Let PXP_\mathsf{X} be the canonical perverse sheaf of kk-vector spaces on the underlying classical stack t0(X)t_0(\mathsf{X}), and let \hbar be a formal parameter.

Perverse-sheaf and BV-quantization conjecture. There is a canonical BV quantization Δ\Delta_\hbar of det(LX)12\det(\mathbb{L}_\mathsf{X})^{\frac12} and a quasi-isomorphism

RΓ(t0(X),PX)( ⁣() ⁣)(RΓ(X,det(LX)12)( ⁣() ⁣),Δ)\mathbf{R}\Gamma(t_0(\mathsf{X}), P_\mathsf{X})(\!(\hbar)\!)\cong (\mathbf{R}\Gamma(\mathsf{X}, \det(\mathbb{L}_\mathsf{X})^{\frac12})(\!(\hbar)\!), \Delta_\hbar)

of chain complexes of k( ⁣() ⁣)k(\!(\hbar)\!)-vector spaces.

This conjecture proposes that the canonical perverse sheaf associated with an oriented (1)(-1)-shifted symplectic Artin stack is captured by its BV quantization after passing to Laurent series in \hbar. The preceding results establish the existence of the perverse sheaf and provide examples, but the claimed canonical quantization and quasi-isomorphism are not resolved in the supplied source.

Sources & referencesView supporting material

Primary source

Pavel Safronov and Brian R. Williams, “Batalin–Vilkovisky quantization and supersymmetric twists”, arXiv:2107.07218 (2021).

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