Search arXiv⌕ Search
Home/Archive/arXiv

arXiv · math/0401164

$W^{(2)}_n$ algebras

BL Feigin·AM Semikhatov
View original source ↗Read source document ↗Export metadata ↓

Abstract

We construct W-algebra generalizations of the ^sl(2) algebra -- W-algebras W^{(2)}_n generated by two currents E and F with the highest pole of order n in their OPE. The n=3 term in this series is the Bershadsky--Polyakov algebra. We define these algebras as a centralizer (commutant) of the $U_{q}sl(n|1)$ super quantum group and explicitly find the generators in a factored, ``Miura-like'' form. Another construction of W^{(2)}_n is in terms of the coset ^sl(n|1)/^sl(n). The relation between the two constructions involves the ``duality'' (k+n-1)(k'+n-1)=1 between levels k and k' of two ^sl(n) algebras.

Explore related subjects

math.QAhep-thmath-phmath.MP

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

BL Feigin, AM Semikhatov. 2004-01-14. $W^{(2)}_n$ algebras. https://doi.org/10.1016/j.nuclphysb.2004.06.056

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Cyclotomic expansions of colored $SU(n)$ invariants of two-strand torus knots and Bailey transforms

Habiro's cyclotomic expansion of the colored Jones polynomial has a higher rank analogue conjectured by Chen--Liu--Zhu for colored $SU(n)$ invariants. We prove this conjecture for torus knots $T(2,2p+1)$ and give a Bailey theoretic realization of the cyclotomic coefficients. For $n\geq2$ and $K_p=T(2,2p+1)$, the colored $SU(n)$ invariants admit an expansion $$ J_N^{SU(n)}(K_p;q) = \sum_{m=0}^{N} \left(\prod_{j=0}^{m-1}\{N-j\}\{N+n+j\}\right) H_m^{(n,p)}(q), $$ where $H_m^{(n,p)}(q)\in\mathbb Z[q^{\pm1}]$ is independent of the color $N$. The proof identifies the cyclotomic basis with a Newton basis and rewrites the resulting Newton coefficients as an ordinary Bailey transform. The Lin--Zheng formula for $T(2,2p+1)$ then gives a well-poised Bailey kernel. A terminating very-well-poised ${}_6ϕ_5$ summation diagonalizes the kernel and reduces the integrality problem to an ordinary Bailey transition. We prove a uniform integrality theorem for these transitions in a formal integral $q$-difference operator algebra. As a direct corollary, the expansion yields the corresponding congruence relations and proves part(i) of the Chen--Liu--Zhu $SU(n)$ volume conjecture for $T(2,2p+1)$.

math.QA↗
arXiv2026

An integral representation of eigenfunctions for the deformed Noumi--Sano operators

The deformed Noumi-Sano operator $H_{n, m}^d(x, y)$ of order $d$ is a simultaneous extension of the Macdonald operator and the Noumi-Sano operator. In this paper, we construct an integral transform associated with eigenvalue problem of $H_{n, m}^d(x, y)$. Using the integral transform, we obtain an integral representation of eigenfunctions for $H_{n, m}^d(x, y)$.

math.QA↗
arXiv2026

Quantum-symmetric equivalence for superpotential algebras

We study superpotential algebras by introducing the notion of quantum-symmetric equivalence defined relatively to two fixed Hopf coactions. This concept relies on the non-vanishing of a bi-Galois object for the two coacting Hopf algebras, where the cotensor product with this object provides a Morita--Takeuchi equivalence between their comodule categories, mapping one superpotenial algebra to the other as comodule algebras. In particular, we investigate $\mathcal{GL}$-type and $\mathcal{SL}$-type quantum-symmetric equivalences using Bichon's reformation of bi-Galois objects in the language of cogroupoids constructed by nondegenerate twisted superpotentials. As applications, for the $\mathcal{GL}$-type, we characterize the Artin--Schelter regularity, or equivalently, twisted Calabi--Yau property, of a superpotential algebra as the non-vanishing of the bi-Galois object in the associated cogroupoid. For the $\mathcal{SL}$-type, we apply the pivotal structure of the comodule categories to study numerical invariants for $\mathcal{SL}$ quantum-symmetric equivalence, including the quantum Hilbert series of the superpotential algebras.

math.QA↗