Genuine Multipartite Entanglement induced by a Thermal Acoustic Reservoir

TL;DR

This paper demonstrates the periodic generation of genuine multipartite entanglement, including GHZ states, in a chain of optomechanical resonators interacting with a thermal acoustic reservoir, revealing new possibilities for noise-resistant quantum information processing.

Contribution

It provides exact analytical solutions showing how a thermal acoustic environment can induce and sustain multipartite entanglement and cat states in optomechanical systems.

Findings

GME can be generated periodically in a heat bath environment.

The system produces high-fidelity multipartite cat states.

The acoustic reservoir's frequency comb structure is key to entanglement generation.

Abstract

Genuine multipartite entanglement (GME) is not only fundamental interesting for the study of quantum-to-classical transition, but also is essential for realizing universal quantum computing and quantum networks. Here we investigate the multipartite entanglement (ME) dynamics in a linear chain of N LC resonators interacting optomechanically with a common thermal acoustic reservoir. By presenting the exact analytical solutions of system evolution, we predict the periodic generation of non-Gaussian ME, including the discrete and continuous variables entanglement. Interestingly, the GME is obtained even though the system is in a heat bath. The mechanism relies on the special acoustic environment featuring frequency comb structure. More importantly, our proposed model also allows the periodic generation of entangled multipartite cat states (MCSs), i.e., a typical GHZ state, with high fidelity. This work fundamentally broadens the fields of ME, and have wide applications in implementing thermal-noise-resistant quantum information processing and many-body quantum simulation.