Many Worlds, the Cluster-state Quantum Computer, and the Problem of the   Preferred Basis
  I argue that the many worlds explanation of quantum computation is not licensed by, and in fact is conceptually inferior to, the many worlds interpretation of quantum mechanics from which it is derived. I argue that the many worlds explanation of quantum computation is incompatible with the recently developed cluster state model of quantum computation. Based on these considerations I conclude that we should reject the many worlds explanation of quantum computation. 
Michael Cuffaro
physics.hist-ph quant-ph