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Regular Seminar Carlos Pineda (Potsdam)
We present a model to study decoherence on non--interacting qubits. Single qubit decoherence (as measured by purity) is obtained in linear response. Two qubit decoherence is solved using the spectator configuration. Entanglement evolution is considered. The n-qubit case is studied using weaker assumptions. Various results are exemplified using a kicked spin chain as a toy model.