  Recently, it was shown that the coupling of center-of-mass and relative
motion in atomic systems leads to inelastic confinement-induced resonances
(ICIRs) [Phys. Rev. Lett. 109, 073201 (2012)]. In the present work, the
possible occurrence of ICIRs in quantum dots is investigated. Particularly,
electron-hole and electron-electron two-body systems with long-range Coulomb
interaction are considered using the material parameters of GaAs. ICIRs are
identified for the electron-hole system verifying the universal nature of the
ICIR and, additionally, resonances due to the coupling of center-of-mass and
relative motion are found also for the electron-electron system. In analogy to
the coherent molecule formation appearing at ICIR in atomic systems a
significant change in the mean distance between electrons and holes at the
resonance is observed. By using the redistribution of the particle densities at
the resonance position in modern quantum-dot experiments, the ICIR can provide
a new technique for the control of the electron distribution in quantum dots
and for the generation of single photons on demand.
