https://doi.org/10.1140/epjd/e2008-00031-5
Lattice bosons in quartic confinement
1
Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India
2
Theoretical Condensed Matter Physics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata, 700064, India
Corresponding author: a rkumar@physics.du.ac.in
Received:
5
September
2007
Revised:
5
December
2007
Published online:
29
February
2008
We present a theoretical study of bose condensation of non-interacting bosons in finite lattices in quartic potentials in one, two, and three dimensions. We investigate dimensionality effects and quartic potential effects on single boson density of energy states, condensation temperature, condensate fraction, and specific heat. The results obtained are compared with corresponding results for lattice bosons in harmonic traps.
PACS: 03.75.Lm – Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations / 03.75.Nt – Other Bose-Einstein condensation phenomena / 03.75.Hh – Static properties of condensates; thermodynamical, statistical, and structural properties
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
