Entanglement dynamics under decoherence: from qubits to qudits
  We investigate the time evolution of entanglement for bipartite systems of arbitrary dimensions under the influence of decoherence. For qubits, we determine the precise entanglement decay rates under different system-environment couplings, including finite temperature effects. For qudits, we show how to obtain upper bounds for the decay rates and also present exact solutions for various classes of states. 
Andr\'e R. R. Carvalho, Florian Mintert, Stefan Palzer, and Andreas   Buchleitner