148 citations · 847 across the 46 of their papers we have counts for
47 papers
Emergence of kaonium as a sharp resonance in photon-photon to meson-meson cross-sections
Alireza Beygi, S. P. Klevansky, R. H. Lemmer
We calculate the binding energies of the hypothetical mesonic atom, (kaonium), using the elastic scattering amplitude. Our findings are in line with…
Three perspectives on entropy dynamics in a non-Hermitian two-state system
Alexander Felski, Alireza Beygi, Christos Karapoulitidis +1
A comparative study of entropy dynamics as an indicator of physical behavior in an open two-state system with balanced gain and loss is presented. We distinguish the perspective ta…
Dyson-Schwinger equations in zero dimensions and polynomial approximations
Carl M. Bender, Christos Karapoulitidis, S. P. Klevansky
The Dyson-Schwinger (DS) equations for a quantum field theory in -dimensional space-time are an infinite sequence of coupled integro-differential equations that are satisfied ex…
Underdetermined Dyson-Schwinger equations
Carl M. Bender, Christos Karapoulitidis, S. P. Klevansky
This paper examines the effectiveness of the Dyson-Schwinger (DS) equations as a calculational tool in quantum field theory. The DS equations are an infinite sequence of coupled eq…
Thermodynamic properties of non-Hermitian Nambu--Jona-Lasinio models
Alexander Felski, Alireza Beygi, S. P. Klevansky
We investigate the impact of non-Hermiticity on the thermodynamic properties of interacting fermions by examining bilinear extensions to the dimensional -symmetric Nam…
$\PT$ Symmetry and Renormalisation in Quantum Field Theory
Carl M Bender, Alexander Felski, S P Klevansky +1
Quantum systems governed by non-Hermitian Hamiltonians with $\PT$ symmetry are special in having real energy eigenvalues bounded below and unitary time evolution. We argue that $\P…