Abstract

We report the dynamics of a polariton condensate, created by a nonresonant light pulse, and the determination of its coherence buildup and decay. The time‐resolved experiments show clearly the interplay between the relevant quantities of polariton condensates: population, linewidth and polarization. A comparison with the results of a Lindblad master equation, describing the dynamics of the system coupled to a reservoir, demonstrates the importance of both the pulse shape and the flow of particles between the ground‐state and the reservoir in the build‐up of the coherence.

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