# Fisher information of accelerated two-qubit system in the presence of the color and white noise channels

## TL;DR

This paper studies how white and color noise affect entanglement in an accelerated two-qubit system, using Fisher information to estimate initial parameters, revealing noise can enhance entanglement and two-qubit estimation is more accurate.

## Contribution

It introduces a detailed analysis of noise effects on entanglement in accelerated qubits and compares Fisher information for single and two-qubit estimations.

## Key findings

- Color noise enhances entanglement at low initial purity.
- White noise strength improves entanglement generation.
- Two-qubit Fisher information provides better parameter estimation.

## Abstract

In this manuscript, we investigate the effect of the white and color noise on a accelerated two-qubit system, where different initial state setting are considered. The behavior of the survival amount of entanglement is quantified for this accelerated system by means of the concurrence. We show that, the color noise enhances the generated entanglement between the two particles even for small values of the initial purity of the accelerated state. However, the larger values of the white noise strength improve the generated entanglement. The initial parameters that describe this system are estimated by using Fisher information, where two forms are considered, namely by using a single and two-qubit forms. It is shown that, by using the two-qubit form, the estimation degree of these parameters is larger than that displayed by using a single-qubit form.