# An Overview: Steady-State Quantum Entanglement via Reservoir Engineering

## TL;DR

This paper reviews methods for generating and maintaining quantum entanglement in a steady state, highlighting approaches, challenges, and applications in quantum technologies like computation, communication, and quantum heat engines.

## Contribution

It provides a comprehensive overview of steady-state quantum entanglement techniques, classifying approaches and discussing their significance for future quantum applications.

## Key findings

- Dissipative schemes enable sustained quantum entanglement.
- Hybrid and purely dissipative methods are key approaches.
- Steady-state entanglement has broad applications in quantum technology.

## Abstract

We present a short overview of quantum entanglement generation and preservation in a steady state. In addition to the focus on quantum entanglement stabilization, we briefly discuss the same objective for steady-state quantum coherence. The overview classifies the approaches into two main categories: hybrid drive and dissipation methods and purely dissipative schemes. Furthermore, purely dissipative schemes are discussed under two subclasses of equilibrium and nonequilibrium environments. The significance of the dissipative route to sustained quantum entanglement and challenges against it are pointed out. Besides the value of steady-state entanglement for existing quantum technologies, quantum computation, communication, sensing, and simulation, its unique opportunities for emerging and future quantum technology applications, particularly quantum heat engines and quantum energy processing, are discussed.