28 citations · 88 across the 18 of their papers we have counts for
18 papers
Optical excitation of interacting electron-hole pairs in disordered one-dimensional semiconductors
Maxim Mostovoy, Frank Antonsen, Jasper Knoester
We apply the optimal fluctuation method to the calculation of the optical absorption in disordered one-dimensional semiconductors below the fundamental optical gap. We find that a…
Sturmian Basis Functions for the Harmonic Oscillator
Frank Antonsen
We define Sturmian basis functions for the harmonic oscillator and investigate whether recent insights into Sturmians for Coulomb-like potentials can be extended to this important…
Time Machines and the Breakdown of Unitarity
Frank Antonsen, Karsten Bormann
We present a generic way of thinking about time machines from the view of a far away observer. In this model the universe consists of three (or more) regions: One containing the en…
Zeta-Functions and Star-Products
Frank Antonsen
We use the definition of a star (or Moyal or twisted) product to give a phasespace definition of the -function. This allows us to derive new closed expressions for the coefficie…
Casimir driven evolution of the universe
Frank Antonsen, Karsten Bormann
For a Friedman-Robertson-Walker space-time in which the only contribution to the stress-energy tensor comes from the renormalised zero-point energy (i.e. the Casimir energy) of the…
Deformation Quantisation of Gravity
Frank Antonsen
We study the deformation (Moyal) quantisation of gravity in both the ADM and the Ashtekar approach. It is shown, that both can be treated, but lead to anomalies. The anomaly in the…