Multiple copy distillation and purification of phase diffused squeezed states

TL;DR

This paper presents a comprehensive theoretical study of protocols for purifying and distilling phase diffused squeezed states of light, including a generalized collective approach for multiple copies and analysis of asymptotic behavior.

Contribution

It introduces a generalized collective purification protocol for multiple copies and derives an analytical expression for the asymptotic limit of the iterative process.

Findings

Asymptotic purification limit characterized analytically

Generalized protocol effective for multiple copies

Insights into properties of phase diffused squeezed states

Abstract

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 semi-analytical expression for the asymptotic limit of the iterative distillation and purification protocol and discuss its properties.