Tensor Products of Random Unitary Matrices
  Tensor products of M random unitary matrices of size N from the circular unitary ensemble are investigated. We show that the spectral statistics of the tensor product of random matrices becomes Poissonian if M=2, N become large or M become large and N=2. 
Tomasz Tkocz, Marek Smaczynski, Marek Kus, Ofer Zeitouni, Karol   Zyczkowski
math.PR quant-ph