Fusing atomic $W$ states via quantum Zeno dynamics

TL;DR

This paper presents a robust scheme for creating large-scale entangled $W$ states by fusing smaller $W$ states using quantum Zeno dynamics, which is feasible experimentally and resilient to common decoherence effects.

Contribution

It introduces a novel fusion method for $W$ states utilizing quantum Zeno dynamics, enabling scalable entanglement generation with robustness against decoherence.

Findings

The scheme successfully fuses smaller $W$ states into larger ones.

It is robust against spontaneous emission and cavity decay.

Feasibility analysis supports experimental realization.

Abstract

We propose a scheme for preparation of large-scale entangled $W$ states based on the fusion mechanism via quantum Zeno dynamics. By sending two atoms belonging to an $n$-atom $W$ state and an $m$-atom $W$ state, respectively, into a vacuum cavity (or two separate cavities), we may obtain a ($n+m-2$)-atom $W$ state via detecting the two-atom state after interaction. The present scheme is robust against both spontaneous emission of atoms and decay of cavity, and the feasibility analysis indicates that it can also be realized in experiment.