Accessory parameters in confluent Heun equations and classical irregular conformal blocks - INSPIRE

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Accessory parameters in confluent Heun equations and classical irregular conformal blocks

O. Lisovyy
(
- IDP, Tours
)
,
A. Naidiuk
(
- IDP, Tours
)

Jan 14, 2021

20 pages

Published in:

Lett.Math.Phys. 111 (2021) 6, 137

Published: Nov 8, 2021

e-Print:

2101.05715 [math-ph]

DOI:

10.1007/s11005-021-01400-6

View in:

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Abstract: (Springer)

Classical Virasoro conformal blocks are believed to be directly related to accessory parameters of Floquet type in the Heun equation and some of its confluent versions. We extend this relation to another class of accessory parameter functions that are defined by inverting all-order Bohr–Sommerfeld periods for confluent and biconfluent Heun equation. The relevant conformal blocks involve Nagoya irregular vertex operators of rank 1 and 2 and conjecturally correspond to partition functions of a 4D

{\mathscr {N}}=2

,

N_f=3

gauge theory at strong coupling and an Argyres–Douglas theory.

Note:

20 pages, 1 figure

Conformal field theory
Accessory parameters
Heun equation
Heun equation
conformal block
operator: vertex
algebra: Virasoro
gauge field theory: supersymmetry
partition function

References(60)

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