Publication details
Coulomb correlated multiparticle states of weakly confining GaAs quantum dots
| Authors | |
|---|---|
| Year of publication | 2026 |
| Type | Peer-reviewed scientific article |
| Magazine / Source | PHYSICAL REVIEW B |
| MU Faculty or unit | |
| Citation | |
| web | https://journals.aps.org/prb/abstract/10.1103/wjw9-blb1 |
| Doi | https://doi.org/10.1103/wjw9-blb1 |
| Keywords | Biexcitons; Trions; III-V semiconductors; Quantum dots; Configuration interaction; Dipole approximation; k dot p method |
| Attached files | |
| Description | We compute the electronic and emission properties of Coulomb–correlated multiparticle states (X0, X±, XX) in weakly confining GaAs/AlGaAs quantum dots using an eight-band k·p model coupled to continuum elasticity and configuration interaction (CI). We evaluate polarization-resolved oscillator strengths and radiative rates both in the dipole approximation and in a quasielectrostatic beyond-dipole (BDA) longitudinal formulation implemented via a Poisson reformulation exactly equivalent to the dyadic Green-tensor kernel. For the dots studied, BDA yields lifetimes in quantitative agreement with experiments, e.g., ?X=0.279ns vs 0.267ns (exp.) and ?X?X=0.101ns vs 0.115ns (exp.). The framework also reproduces electric-field tuning of the multiparticle electronic structure and emission—including the indistinguishability inferred from P=?X/(?X+?X?X)—and we assess sensitivity to CI-basis size and to electron–electron and hole–hole exchange. |