Two-dimensional quantum-dot helium in a magnetic field: Variational theory

Details Two-dimensional quantum-dot helium in a magnetic field: Variational theory Two-dimensional quantum-dot helium in a magnetic field: Variational theory

2007-08-27

arxiv.org/abs/0708.3690v1

Phys. Rev. B 72, 205334 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 4 figures, 4 tables

Scientific paper

10.1103/PhysRevB.72.205334

A trial wave function for two-dimensional quantum dot helium in an arbitrary perpendicular magnetic field (a system of two interacting electrons in a two-dimensional parabolic confinement potential) is introduced. A key ingredient of this trial wave function is a Jastrow pair correlation factor that has a displaced Gaussian form. The above choice of the pair correlation factor is instrumental on assuring the overall quality of the wave function at all values of the magnetic field.Exact numerical diagonalization results are used to gauge the quality of the proposed trial wave function.We find out that this trial wave function is an excellent representation of the true ground state at all values of the magnetic field including weak (or zero) and strong magnetic fields.

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