Gaussian state entanglement witnessing through lossy compression

TL;DR

This paper introduces a method to detect entanglement in Gaussian states of continuous-variable systems by transferring their states to qubits via local lossy processes, simplifying the entanglement verification process.

Contribution

It presents a novel entanglement witnessing technique using local lossy state transfer to qubits, making complex system analysis more accessible.

Findings

Effective entanglement detection in Gaussian states

Simplification of entanglement witnessing process

Potential for application in complex quantum systems

Abstract

We propose a method to witness entanglement between two continuous-variable systems in a Gaussian state. Its key ingredient is a local lossy state transfer from the original spatially separated systems onto two spatially separated qubits. The qubits are initially in a pure product state, therefore by detecting entanglement between the qubits we witness entanglement between the two original systems. This method greatly simplifies entanglement witnessing in complex systems.