38 citations · 86 across the 6 of their papers we have counts for
9 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…
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…