Generation of Massive Entanglement Through Adiabatic Quantum Phase Transition in a spinor condensate

TL;DR

This paper presents a method to generate large-scale entanglement in a spinor Bose-Einstein condensate by adiabatically crossing a quantum phase transition, resulting in robust many-body entanglement measurable by entanglement depth.

Contribution

The authors introduce a novel adiabatic protocol to produce massive entanglement in spinor condensates, demonstrating robustness and feasibility for hundreds of atoms.

Findings

Entanglement depth can reach that of Dicke states.

The scheme is robust against noise and imperfections.

Genuine entanglement is achievable with realistic experimental conditions.

Abstract

We propose a method to generate massive entanglement in a spinor Bose-Einstein condensate from an initial product state through adiabatic sweep of magnetic field across a quantum phase transition induced by competition between the spin-dependent collision interaction and the quadratic Zeeman effect. The generated many-body entanglement is characterized by the experimentally measurable entanglement depth in the proximity of the Dicke state. We show that the scheme is robust to practical noise and experimental imperfection and under realistic conditions it is possible to generate genuine entanglement for hundreds of atoms.