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Symmetry breaking and the random-phase approximation in small quantum dots | | Llorens Serra
; Rashid G. Nazmitdinov
; A. Puente
; | | Date: |
10 Apr 2003 | | Journal: | Phys. Rev. B 68, 035341 (2003) | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons | cond-mat.mes-hall cond-mat.str-el nucl-th | | Abstract: | The random-phase approximation has been used to compute the properties of parabolic two-dimensional quantum dots beyond the mean-field approximation. Special emphasis is put on the ground state correlation energy, the symmetry restoration and the role of the spurious modes within the random-phase approximation. A systematics with the Coulombic interaction strength is presented for the 2-electron dot, while for the 6- and 12-electron dots selected cases are discussed. The validity of the random-phase approximation is assessed by comparison with available exact results. | | Source: | arXiv, cond-mat/0304246 | | Services: | Forum | Review | PDF | Favorites | |
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