Interacting electrons on a quantum ring: exact and variational approach

Details Interacting electrons on a quantum ring: exact and variational approach Interacting electrons on a quantum ring: exact and variational approach

2005-11-03

arxiv.org/abs/cond-mat/0511075v3

New J. Phys. Vol. 8 p. 211 year 2006

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

19 pages, 10 figures. Accepted for publication in the New Journal of Physics

Scientific paper

10.1088/1367-2630/8/9/211

We study a system of interacting electrons on a one-dimensional quantum ring using exact diagonalization and the variational quantum Monte Carlo method. We examine the accuracy of the Slater-Jastrow -type many-body wave function and compare energies and pair distribution functions obtained from the two approaches. Our results show that this wave function captures most correlation effects. We then study the smooth transition to a regime where the electrons localize in the rotating frame, which for the ultrathin quantum ring system happens at quite high electron density.

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