51 citations · 200 across the 14 of their papers we have counts for
14 papers
Quantisations of exactly solvable ghostly models
Andreas Fring, Takano Taira, Bethan Turner
We investigate an exactly solvable two-dimensional Lorentzian coupled quantum system that in a certain parameter regime can be transformed to a higher time derivative theory (HTDT)…
Nonlinear evolution of disturbances in higher time-derivative theories
Andreas Fring, Takano Taira, Bethan Turner
We investigate the evolution of localized initial value profiles when propagated in integrable versions of higher time-derivative theories. In contrast to the standard cases in non…
Higher time-derivative theories from space-time interchanged integrable field theories
Andreas Fring, Takano Taira, Bethan Turner
We compare a relativistic and a nonrelativistic version of Ostrogradsky's method for higher-time derivative theories extended to scalar field theories and consider as an alternativ…
Non-Hermitian Quantum Fermi Accelerator
Andreas Fring, Takano Taira
We exactly solve a quantum Fermi accelerator model consisting of a time-independent non-Hermitian Hamiltonian with time-dependent Dirichlet boundary conditions. A Hilbert space for…
Time-dependent C-operators as Lewis-Riesenfeld invariants in non-Hermitian theories
Andreas Fring, Takanobu Taira, Rebecca Tenney
-operators were introduced as involution operators in non-Hermitian theories that commute with the time-independent Hamiltonians and the parity/time-reversal operator. He…
Complex topological soliton with real energy in particle physics
Takanobu Taira
We summarise the procedure used to find the classical masses of Higgs particle, massive gauge boson and t'Hooft-Polyakov monopole in non-Hermitian gauge field theory. Their physica…
Stability in integrable nonlocal nonlinear equations
Julia Cen, Francisco Correa, Andreas Fring +1
Recently a variety of nonlocal integrable systems has been introduced that besides fields located at particlar space-time points simultaneously also contain fields that are located…
Linearly stable and unstable complex soliton solutions with real energies in the Bullough-Dodd model
Francisco Correa, Andreas Fring, Takanobu Taira
We investigate different types of complex soliton solutions with regard to their stability against linear pertubations. In the Bullough-Dodd scalar field theory we find linearly st…
Complex BPS Skyrmions with real energy
Francisco Correa, Andreas Fring, Takanobu Taira
We propose and investigate several complex versions of extensions and restrictions of the Skyrme model with a well-defined Bogomolny-Prasad-Sommerfield (BPS) limit. The models stud…
Complex BPS solitons with real energies from duality
Andreas Fring, Takanobu Taira
Following a generic approach that leads to Bogomolny-Prasad-Sommerfield (BPS) soliton solutions by imposing self-duality, we investigate three different types of non-Hermitian fiel…
't Hooft-Polyakov monopoles in non-Hermitian quantum field theory
Andreas Fring, Takanobu Taira
We construct exact t Hooft-Polyakov monopole solutions in a non-Hermitian field theory with local non-Abelian SU(2) gauge symmetry and a modified antilinear CPT symmetry. The solut…
Massive gauge particles versus Goldstone bosons in non-Hermitian non-Abelian gauge theory
Andreas Fring, Takanobu Taira
We investigate the Englert-Brout-Higgs-Guralnik-Hagen-Kibble mechanism for non-Hermitian field theories with local non-Abelian gauge symmetry in different regions of their paramete…
Pseudo-Hermitian approach to Goldstone's theorem in non-Abelian non-Hermitian quantum field theories
Andreas Fring, Takanobu Taira
We generalise previous studies on the extension of Goldstone's theorem from Hermitian to non-Hermitian quantum field theories with Abelian symmetries to theories possessing a gloca…
Goldstone bosons in different PT-regimes of non-Hermitian scalar quantum field theories
Andreas Fring, Takanobu Taira
We study the interplay between spontaneously breaking global continuous and discrete antilinear symmetries in a newly proposed general class of non-Hermitian quantum field theories…