We report an important step forward for the goal of unambiguous observationof Bose-Einstein condensation of excitons in semiconductors. We havedemonstrated a system in which excitons live for microseconds, much longer thantheir thermalization time, move over distances of hundreds of microns, and canbe trapped in a harmonic potential exactly analous to the traps for atomiccondensates. We also report recent results of a new method for observingevidence of Bose-Einstein condensation, by angular resolution of the emittedluminescence.
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