Nondeterministic Noiseless Linear Amplification of Quantum Systems

TL;DR

This paper presents a new nondeterministic noiseless linear amplification method for quantum systems, enabling applications like probabilistic cloning and entanglement distillation with current optical technology.

Contribution

It introduces the concept and practical realization of nondeterministic noiseless linear amplification, expanding quantum information processing capabilities.

Findings

Enables ideal probabilistic cloning of coherent states

Allows distillation of high-purity entanglement from lossy channels

Proposes a feasible optical implementation with existing technology

Abstract

We introduce the concept of non-deterministic noiseless linear amplification. We propose a linear optical realization of this transformation that could be built with current technology. We discuss two applications; ideal probabilistic cloning of coherent states and distillation of continuous variable entanglement. For the latter example we demonstrate that highly pure entanglement can be distilled from transmission over a lossy channel.