Addition and removal energies of circular quantum dots
arXiv:1707.00229 · doi:10.1063/1.4995615
Abstract
We present and compare several many-body methods as applied to two-dimensional quantum dots with circular symmetry. We calculate the approximate ground state energy using a harmonic oscillator basis optimized by Hartree-Fock (HF) theory and further improve the ground state energy using two post-HF methods: in-medium similarity renormalization group (IM-SRG) and coupled cluster with singles and doubles (CCSD). With the application of quasidegenerate perturbation theory (QDPT) or the equations-of-motion (EOM) method to the results of the previous two methods, we obtain addition and removal energies as well. Our results are benchmarked against full configuration interaction (FCI) and diffusion Monte Carlo (DMC) where available. We examine the rate of convergence and perform extrapolations to the infinite basis limit using a power-law model.
45 pages, 11 figures. v2: Prune background theory + minor fixes based on review
References in corpus (10)
- Similarity Renormalization Group for Nucleon-Nucleon Interactions
- In-Medium Similarity Renormalization Group for Nuclei
- Full configuration interaction approach to the few-electron problem in artificial atoms
- In-Medium Similarity Renormalization Group for Open-Shell Nuclei
- Ab Initio Multi-Reference In-Medium Similarity Renormalization Group Calculations of Even Calcium and Nickel Isotopes
- A driven similarity renormalization group approach to quantum many-body problems
- In-Medium Similarity Renormalization Group for Closed and Open-Shell Nuclei
- Operator Evolution via the Similarity Renormalization Group I: The Deuteron
- Measurement efficiency and n-shot read out of spin qubits
- Effective interactions and large-scale diagonalization for quantum dots