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Abstract

Performing optical spectroscopy of highly homogeneous quantum dot
arrays in ultrahigh magnetic fields, an unprecedently well resolved
Fock-Darwin spectrum is observed. The existence of up to four
degenerate electronic shells is demonstrated where the magnetic field
lifts the initial degeneracies, which reappear when levels with
different angular momenta come into resonance. The resulting level
shifting and crossing pattern also show evidence of many-body effects
such as the mixing of configurations and exciton condensation at the
resonances.