Phase transitions, entanglement and quantum noise interferometry in cold atoms

TL;DR

This paper demonstrates that entanglement measures and noise correlations can effectively characterize quantum phase transitions in cold atoms, revealing universal scaling and entanglement features accessible through experiments.

Contribution

It shows that entanglement monotones and noise correlations can detect and characterize quantum phase transitions, linking entanglement properties with experimentally measurable quantities.

Findings

Entanglement monotones peak sharply at the critical point.

Noise correlations encode entanglement information.

Universal scaling behavior is observed at the phase transition.

Abstract

We show that entanglement monotones can characterize the pronounced enhancement of entanglement at a quantum phase transition if they are sensitive to long-range high order correlations. These monotones are found to develop a sharp peak at the critical point and to exhibit universal scaling. We demonstrate that similar features are shared by noise correlations and verify that these experimentally accessible quantities indeed encode entanglement information and probe separability.