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7 papers · 1 filter
Is the Hofstadter energy spectrum observable in far-infrared absorption?
Vidar Gudmundsson, Rolf R. Gerhardts
The far-infrared absorption of a periodically modulated two-dimensional electron gas in a perpendicular constant magnetic field is calculated self-consistently within the Hartree a…
Manifestation of the Hofstadter butterfly in far-infrared absorption
Vidar Gudmundsson, Rolf R. Gerhardts
The far-infrared absorption of a two-dimensional electron gas with a square-lattice modulation in a perpendicular constant magnetic field is calculated self-consistently within the…
The effects of compressible and incompressible states on the FIR-absorption of quantum wires and dots in a magnetic field
Vidar Gudmundsson, Arne Brataas, Christoph Steinebach +3
We investigate the effects of compressible and incompressible states on the FIR-absorption of quantum wires and dots in a homogeneous perpendicular magnetic field. The electron-ele…
The evolution of Bernstein modes in quantum wires with increasing deviation from parabolic confinement
Arne Brataas, Vidar Gudmundsson, A. G. Mal'shukov +1
We investigate the evolution of the interaction of the magnetoplasmon resonance with the harmonics of the cyclotron resonance as the confinement of an electron gas in a quantum wir…
Collective Excitations in Realistic Quantum Wires
Arne Brataas, A. G. Mal'shukov, Vidar Gudmundsson +1
We have used the Hartree-Fock Random Phase Approximation (HF-RPA) to study the interacting electron gas in a quantum wire. The spectra of intersubband spin-flip excitations reveal…
Density Matrix Functional Calculations for Matter in Strong Magnetic Fields: I. Atomic Properties
Kristinn Johnsen, Jakob Yngvason
We report on a numerical study of the density matrix functional introduced by Lieb, Solovej and Yngvason for the investigation of heavy atoms in high magnetic fields. This function…