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

Article

关键词: GROUND-STATE ENERGY;    PEAK SPACINGS;    STATISTICS;    ELECTRONS;   

DOI  :  10.1103/PhysRevB.61.1720

来源: SCIE

【 摘 要 】

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 (HF) 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 structure is absent and fluctuations are significantly reduced.

【 授权许可】

Free