53 citations · 130 across the 10 of their papers we have counts for
11 papers
Energy shift and decay width of kaonium from coupled-channel one-loop chiral amplitudes
Alireza Beygi
Using two fitted coupled-channel one-loop chiral amplitudes, we investigate the strong-interaction energy shift and decay width of the hypothetical Coulomb-bound hadronic…
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…
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…
Non-Hermitian extension of the Nambu--Jona-Lasinio model in 3+1 and 1+1 dimensions
Alexander Felski, Alireza Beygi, S. P. Klevansky
This paper presents a non-Hermitian PT-symmetric extension of the Nambu--Jona-Lasinio (NJL) model of quantum chromodynamics in 3+1 and 1+1 dimensions. In 3+1 dimensions, the SU(2)-…
Continuous quantum phase transition in the fermionic mass solutions of the Nambu-Jona-Lasinio model
Alireza Beygi, S. P. Klevansky, R. H. Lemmer
Recently quantum simulators have been constructed to investigate experimentally the most prominent theoretical four-point many-body system described by the Hubbard model. By varyin…
Relativistic PT-symmetric fermionic theories in 1+1 and 3+1 dimensions
Alireza Beygi, S. P. Klevansky, C. M. Bender
Relativistic PT-symmetric fermionic interacting systems are studied in 1+1 and 3+1 dimensions. The objective is to include non-Hermitian PT-symmetric interaction terms that give {\…
No-signaling principle and quantum brachistochrone problem in -symmetric fermionic two- and four-dimensional models
Alireza Beygi, S. P. Klevansky
Fermionic systems differ from bosonic ones in several ways, in particular that the time-reversal operator is odd, . For -symmetric bosonic systems, the no-signaling…
Two- and four-dimensional representations of the PT- and CPT-symmetric fermionic algebras
Alireza Beygi, S. P. Klevansky, Carl M. Bender
Fermionic systems differ from their bosonic counterparts, the main difference with regard to symmetry considerations being that for fermionic systems. In PT-symmetric quan…
Analytic structure of eigenvalues of coupled quantum systems
Carl M. Bender, Alexander Felski, Nima Hassanpour +2
By analytically continuing the coupling constant of a coupled quantum theory, one can, at least in principle, arrive at a state whose energy is lower than the ground state of t…
Coupled Oscillator Systems Having Partial PT Symmetry
Alireza Beygi, S. P. Klevansky, Carl M. Bender
This paper examines chains of coupled harmonic oscillators. In isolation, the th oscillator () has the natural frequency and is described by the Hamilto…