Multiple-copy distillation and purification of phase-diffused squeezed states
Petr Marek, Jaromı́r Fiurášek, Boris Hage, Alexander Franzen, James DiGugliemo, Roman Schnabel · Physical Review A · 2007
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 and purification protocol and discuss its properties.