133 citations · 1.5k across the 54 of their papers we have counts for
6 papers · 1 filter
First-order formalism for functions in bosonic sigma models from supersymmetry breaking
Oleksandr Gamayun, Andrei Losev, Mikhail Shifman
We consider the renormalization group flow equation for the two-dimensional sigma models with the Kähler target space. The first-order formulation allows us to treat perturbations…
Non-reciprocal topological solitons in active metamaterials
Jonas Veenstra, Oleksandr Gamayun, Xiaofei Guo +3
From protein motifs to black holes, topological solitons are pervasive nonlinear excitations that are robust and can be driven by external fields. So far, existing driving mechanis…
Kubo-Martin-Schwinger relation for an interacting mobile impurity
Oleksandr Gamayun, Miłosz Panfil, Felipe Taha Sant'Ana
In this work we study the Kubo-Martin-Schwinger (KMS) relation in the Yang-Gaudin model of an interacting mobile impurity. We use the integrability of the model to compute the dyna…
Peculiarities of beta functions in sigma models
Oleksandr Gamayun, Andrei Losev, Mikhail Shifman
In this paper we consider perturbation theory in generic two-dimensional sigma models in the so-called first-order formalism, using the coordinate regularization approach. Our goal…
Finite temperature spin diffusion in the Hubbard model in the strong coupling limit
Oleksandr Gamayun, Arthur Hutsalyuk, Balázs Pozsgay +1
We investigate finite temperature spin transport in one spatial dimension by considering the spin-spin correlation function of the Hubbard model in the limiting case of infinitely…
Emergence of anyonic correlations from spin and charge dynamics in one dimension
Oleksandr Gamayun, Eoin Quinn, Kemal Bidzhiev +1
We propose a transformation for spin and charge degrees of freedom in one-dimensional lattice systems, constrained to have no doubly occupied sites, that allows direct access to th…