Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-04-23
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
11 pages, 1 figure, 5 tables
Scientific paper
An implementation of the coupled-cluster single- and double excitations (CCSD) method on two-dimensional quantum dots is presented. Advantages and limitations are studied through comparison with other high accuracy approaches for two to eight confined electrons. The possibility to effectively use a very large basis set is found to be an important advantage compared to full configuration interaction implementations. For the two to eight electron ground states, with a confinement strength close to what is used in experiments, the error in the energy introduced by truncating triple excitations and beyond is shown to be on the same level or less than the differences in energy given by two different Quantum Monte Carlo methods. Convergence of the iterative solution of the coupled cluster equations is, for some cases, found for surprisingly weak confinement strengths even when starting from a non-interacting basis. The limit where the missing triple and higher excitations become relevant is investigated through comparison with full Configuration Interaction results.
Lindroth Eva
Waltersson Erik
No associations
LandOfFree
Performance of the coupled cluster singles and doubles method on two-dimensional quantum dots does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Performance of the coupled cluster singles and doubles method on two-dimensional quantum dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Performance of the coupled cluster singles and doubles method on two-dimensional quantum dots will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-694357