Diffusion Monte Carlo study of circular quantum dots | |
Article | |
关键词: DENSITY-FUNCTIONAL THEORY; MAGNETIC-FIELD; CAPACITANCE SPECTROSCOPY; ARTIFICIAL ATOMS; WAVE-FUNCTIONS; ELECTRONS; SINGLE; SYMMETRY; SPECTRA; STATES; | |
DOI : 10.1103/PhysRevB.62.8120 | |
来源: SCIE |
【 摘 要 】
We present ground- and excited-state energies obtained from diffusion Monte Carlo (DMC) calculations, using accurate multiconfiguration wave functions, for N electrons (N less than or equal to 13) confined to a circular quantum dot. We compare the density and correlation energies to the predictions of local spin density approximation (LSDA) theory, and analyze the electron-electron pair-correlation functions. The DMC estimated change in electrochemical potential as a function of the number of electrons in the dot is compared to that from LSDA and HF calculations. Hund's first rule is found to be satisfied for all dots except N = 4 for which there is a near degeneracy.
【 授权许可】
Free