71 citations
9 papers
Goldstone boson counting in linear sigma models with chemical potential
Tomas Brauner
We analyze the effects of finite chemical potential on spontaneous breaking of internal symmetries within the class of relativistic field theories described by the linear sigma mod…
Experimental Investigation of Weak Non-Mesonic Decay of 10Be(Lambda)Hypernuclei at CEBAF
S. Majewski, L. Majling, A. Margaryan +1
Hypernuclei are convenient laboratory to study the baryon-baryon weak interaction and associated effective Hamiltonian. The strangeness changing process, in which a Lambda hyperon…
An explicitly solvable model of the spontaneous PT-symmetry breaking
Vit Jakubsky, Miloslav Znojil
We contemplate the pair of the purely imaginary delta-function potentials on a finite interval with Dirichlet boundary conditions. The two parameter model exhibits nicely the expec…
Solvable relativistic quantum dots with vibrational spectra
Miloslav Znojil
For Klein-Gordon equation a consistent physical interpretation of wave functions is reviewed as based on a proper modification of the scalar product in Hilbert space. Bound states…
Dynamical fermion mass generation by a strong Yukawa interaction
Tomas Brauner, Jiri Hosek
We consider a model with global Abelian chiral symmetry of two massless fermion fields interacting with a complex massive scalar field. We argue that the Schwinger-Dyson equations…
Perturbation method for non-square Hamiltonians and its application to polynomial oscillators
Miloslav Znojil
A remarkable extension of Rayleigh-Schroedinger perturbation method is found. Its (N+q) x (N+1) - dimensional Hamiltonians (as emerging, e.g., during quasi-exact constructions of b…