7 papers
Managing the supercell approximation for charged defects in semiconductors: finite size scaling, charge correction factors, the bandgap problem and the ab initio dielectric constant
C. W. M. Castleton, A. Hoglund, S. Mirbt
The errors arising in ab initio density functional theory studies of semiconductor point defects using the supercell approximation are analyzed. It is demonstrated that a) the lead…
Finite size scaling as a cure for supercell approximation errors in calculations of neutral native defects in InP
C. W. M. Castleton, S. Mirbt
The relaxed and unrelaxed formation energies of neutral antisites and interstitial defects in InP are calculated using ab initio density functional theory and simple cubic supercel…
Broadcasting of entanglement at a distance using linear optics and telecloning of entanglement
Iulia Ghiu, Anders Karlsson
We propose a scheme for broadcasting entanglement at a distance based on linear optics. We show that an initial polarization entangled state can be simultaneously split and transmi…
Stability of the solutions of the Gross-Pitaevskii equation
A. D. Jackson, G. M. Kavoulakis, E. Lundh
We examine the static and dynamic stability of the solutions of the Gross-Pitaevskii equation and demonstrate the intimate connection between them. All salient features related to…
Phases of a rotating Bose-Einstein condensate with anharmonic confinement
A. D. Jackson, G. M. Kavoulakis, E. Lundh
We examine an effectively repulsive Bose-Einstein condensate of atoms that rotates in a quadratic-plus-quartic potential. With use of a variational method we identify the three pos…
Radiative collisional heating at the Doppler limit for laser-cooled magnesium atoms
J. Piilo, E. Lundh, K. -A. Suominen
We report Monte Carlo wave function simulation results on cold collisions between magnesium atoms in a strong red-detuned laser field. This is the normal situation e.g. in magneto-…