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Non-stationary difference equation for q-Virasoro conformal blocks

  • Sh. Shakirov

摘要

Conformal blocks of qt-deformed Virasoro and \({\mathcal {W}}\) W -algebras are important special functions in representation theory with applications in geometry and physics. In the Nekrasov–Shatashvili limit \(t \rightarrow 1\) t 1 , whenever one of the representations is degenerate then conformal block satisfies a difference equation with respect to the coordinate associated with that degenerate representation. This is a stationary Schrodinger equation for an appropriate relativistic quantum integrable system. It is expected that generalization to generic \(t \ne 1\) t 1 is a non-stationary Schrodinger equation where t parametrizes shift in time. In this paper we make the non-stationary equation explicit for the qt-Virasoro block with one degenerate and four generic Verma modules and prove it when three modules out of five are degenerate, using occasional relation to Macdonald polynomials.