# Fast and high-fidelity generation of steady-state entanglement using pulse modulation and parametric amplification

## TL;DR

This paper presents a method combining pulse modulation and parametric amplification to rapidly generate high-fidelity steady-state entanglement with enhanced robustness and significantly reduced stabilization time.

## Contribution

It introduces an exponential enhancement of atom-cavity interaction and amplitude modulation to accelerate entanglement generation while maintaining high fidelity.

## Key findings

- Achieves 98.5% fidelity at cooperativity C=30.
- Reduces stabilization time by about 10 times.
- Demonstrates robustness against amplitude noise and systematic errors.

## Abstract

We explore an intriguing alternative for a fast and high-fidelity generation of steady-state entanglement. By exponentially enhancing the atom-cavity interaction, we obtain an exponentially-enhanced effective cooperativity of the system, which results in a high fidelity of the state generation. Meanwhile, we modulate the amplitudes of the driving fields to accelerate the population transfer to a target state, e.g., a Bell state. An exponentially-shortened stabilization time is thus predicted. Specifically, when the cooperativity of the system is $C=30$, the fidelity of the acceleration scheme reaches $98.5\%$, and the stabilization time is about 10 times shorter than that without acceleration. Moreover, we find from the numerical simulation that the acceleration scheme is robust against systematic and stochastic (amplitude-noise) errors.