129 citations · 533 across the 11 of their papers we have counts for
11 papers
Quantum rings for beginners II: Bosons versus fermions
M. Manninen, S. Viefers, S. M. Reimann
The purpose of this overview article, which can be viewed as a supplement to our previous review on quantum rings, [S. Viefers {\it et al}, Physica E {\bf 21} (2004), 1-35], is to…
Magnetism and Hund's Rule in an Optical Lattice with Cold Fermions
K. Karkkainen, M. Borgh, M. Manninen +1
Artificially confined, small quantum systems show a high potential for employing quantum physics in technology. Ultra-cold atom gases have opened an exciting laboratory in which to…
Magnetism in one-dimensional quantum dot arrays
K. Karkkainen, M. Koskinen, S. M. Reimann +1
We employ the density functional Kohn-Sham method in the local spin-density approximation to study the electronic structure and magnetism of quasi one-dimensional periodic arrays o…
Many-body spectrum and particle localization in quantum dots and finite rotating Bose condensates
M. Manninen, S. Viefers, M. Koskinen +1
The yrast spectra (i.e. the lowest states for a given total angular momentum) of quantum dots in strong magnetic fields, are studied in terms of exact numerical diagonalization and…
Current-spin-density functional study of persistent currents in quantum rings
S. Viefers, P. Singha Deo, S. M. Reimann +2
We present a numerical study of persistent currents in quantum rings using current spin density functional theory (CSDFT). This formalism allows for a systematic study of the joint…
Rotational and vibrational spectra of quantum rings
M. Koskinen, M. Manninen, B. Mottelson +1
One can confine the two-dimensional electron gas in semiconductor heterostructures electrostatically or by etching techniques such that a small electron island is formed. These man…
Bose condensates at high angular momenta
S. Viefers, T. H. Hansson, S. M. Reimann
We exploit the analogy with the Quantum Hall (QH) system to study weakly interacting bosons in a harmonic trap. For a -function interaction potential the ``yrast'' states with $…
Broken Symmetries in the Reconstruction of v=1 Quantum Hall Edges
S. M. Reimann, M. Koskinen, S. Viefers +2
Spin-polarized reconstruction of the v=1 quantum Hall edge is accompanied by a spatial modulation of the charge density along the edge. We find that this is also the case for finit…
The effect of interactions on Bose-Einstein condensation in a two-dimensional harmonic trap
R. K. Bhaduri, S. M. Reimann, S. Viefers +2
A dilute bose gas in a quasi two-dimensional harmonic trap and interacting with a repulsive two-body zero-range potential of fixed coupling constant is considered. Using the Thomas…
Ellipsoidal deformation of vertical quantum dots
D. G. Austing, S. Sasaki, S. Tarucha +3
Addition energy spectra at 0 T of circular and ellipsoidally deformed few-electron vertical quantum dots are measured and compared to results of model calculations within spin-dens…
Quantum dots in magnetic fields: Phase diagram and broken symmetry of the Chamon-Wen edge
S. M. Reimann, M. Koskinen, M. Manninen +1
Quantum dots in magnetic fields are studied within the current spin density functional formalism avoiding any spatial symmetry restrictions of the solutions. We find that the maxim…