Level fluctuations and many-body effects in disorder-free quantum dots

Min-Chul Cha, S.-R. Eric Yang
2000 Physical Review B (Condensed Matter)  
We have investigated whether many-body effects can induce significant level fluctuations in a disorder-free quantum dot. The closed energy shell structures and relaxation of the Hartree-Fock potentials are found to play a significant role. The level degeneracy consistent with the rotational symmetry of the confining potential determines the structure of the energy shells. A closed shell state of a dot can give rise to large fluctuations. When a strong magnetic field is present the shell
more » ... e is absent and fluctuations are significantly reduced.
doi:10.1103/physrevb.61.1720 fatcat:vx2fc2ct2jbxhhqimposhcr7eu