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We present results of correlated pseudopotential calculations of an excitonin a pair of vertically stacked InGaAs/GaAs dots. Competing effects of strain,geometry, and band mixing lead to many unexpected features missing incontemporary models. The first four excitonic states are all optically activeat small interdot separation, due to the broken symmetry of the single-particlestates. We quantify the degree of entanglement of the exciton wavefunctions andshow its sensitivity to interdot separation. We suggest ways tospectroscopically identify and maximize the entanglement of exciton states.Comment: To be published in PR

Theory of Excitonic Spectra and Entanglement Engineering in Dot Molecules