6 papers
Boundary criticality in the Gross-Neveu-Yukawa model at higher orders
Oleksandr Diatlyk, Simone Giombi, Zimo Sun
We extend the study of boundary criticality in the Gross-Neveu-Yukawa universality class beyond leading order. Using the hyperbolic space formulation of boundary conformal field th…
Extraordinary Surface Criticalities for Interacting Fermions
Oleksandr Diatlyk, Zimo Sun, Yifan Wang
Interacting fermions exhibit a rich landscape of surface defects and associated critical phenomena. We investigate novel surface critical behavior in the three-dimensional Gross-Ne…
-symmetric Field Theories at Finite Temperature
Oleksandr Diatlyk, Andrei Katsevich, Fedor K. Popov
We investigate the thermal properties of -symmetric scalar field theories with purely imaginary couplings. The free energy governs the asymptotic density of states, p…
Gauging Non-Invertible Symmetries: Topological Interfaces and Generalized Orbifold Groupoid in 2d QFT
Oleksandr Diatlyk, Conghuan Luo, Yifan Wang +1
Gauging is a powerful operation on symmetries in quantum field theory (QFT), as it connects distinct theories and also reveals hidden structures in a given theory. We initiate a sy…
Defect Fusion and Casimir Energy in Higher Dimensions
Oleksandr Diatlyk, Himanshu Khanchandani, Fedor K. Popov +1
We study the operator algebra of extended conformal defects in more than two spacetime dimensions. Such algebra structure encodes the combined effect of multiple impurities on phys…
Surprises in the Ordinary: Invariant Surface Defect in the -expansion
Oleksandr Diatlyk, Zimo Sun, Yifan Wang
We study an invariant surface defect in the Wilson-Fisher conformal field theory (CFT) in dimensions. This defect is defined by mass deformation on a two-dimensiona…