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Multiple-copy distillation and purification of phase-diffused squeezed states
We provide a detailed theoretical analysis of multiple-copy purification and distillation protocols for phase-diffused squeezed states of light. The standard iterative distillation protocol is generalized to a collective purification of an arbitrary number of $N$ copies. We also derive a semianalytical expression for the asymptotic limit of the iterative distillation …