Rates of Convergence to Stationarity for Multidimensional RBM
  We provide the first rate of convergence analysis for RBM as the dimension grows under natural uniformity conditions. In particular, if the underlying routing matrix is uniformly contractive, uniform stability of the drift vector holds, and the variances of the underlying Brownian Motion (BM) are bounded, then we show that the RBM converges exponentially fast to stationarity with a relaxation time of order $O(d^4\log(d)^2)$ as $d\to\infty$. 
Jose Blanchet and Xinyun Chen
math.PR